char = R;code = 82 char = e;code = 101 char = l;code = 108 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = h;code = 104 char = i;code = 105 char = p;code = 112 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = t;code = 116 char = w;code = 119 char = e;code = 101 char = e;code = 101 char = n;code = 110 char = ;code = 32 char = d;code = 100 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = r;code = 114 char = i;code = 105 char = s;code = 115 char = k;code = 107 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = u;code = 117 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = :;code = 58 char = ;code = 32 char = s;code = 115 char = t;code = 116 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = s;code = 115 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = e;code = 101 char = v;code = 118 char = a;code = 97 char = l;code = 108 char = u;code = 117 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = b;code = 98 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = m;code = 109 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = r;code = 114 char = e;code = 101 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = p;code = 112 char = a;code = 97 char = t;code = 116 char = o;code = 111 char = c;code = 99 char = a;code = 97 char = r;code = 114 char = c;code = 99 char = i;code = 105 char = n;code = 110 char = o;code = 111 char = g;code = 103 char = e;code = 101 char = n;code = 110 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = N;code = 78 char = -;code = 45 char = n;code = 110 char = i;code = 105 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = s;code = 115 char = a;code = 97 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = t;code = 116 char = s;code = 115 char = .;code = 46 result sql = Relationship between dose and risk reduction: statistical evaluation of a combination experiment with three hepatocarcinogenic N-nitrosamines in rats.
Relationship between dose and risk reduction: statistical evaluation of a combination experiment with three hepatocarcinogenic N-nitrosamines in rats.char = D;code = 68 char = a;code = 97 char = t;code = 116 char = a;code = 97 char = ;code = 32 char = f;code = 102 char = r;code = 114 char = o;code = 111 char = m;code = 109 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = m;code = 109 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = b;code = 98 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = f;code = 102 char = f;code = 102 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = v;code = 118 char = e;code = 101 char = r;code = 114 char = y;code = 121 char = ;code = 32 char = l;code = 108 char = o;code = 111 char = w;code = 119 char = ;code = 32 char = d;code = 100 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = N;code = 78 char = -;code = 45 char = n;code = 110 char = i;code = 105 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = s;code = 115 char = o;code = 111 char = d;code = 100 char = i;code = 105 char = e;code = 101 char = t;code = 116 char = h;code = 104 char = y;code = 121 char = l;code = 108 char = a;code = 97 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = e;code = 101 char = ;code = 32 char = (;code = 40 char = N;code = 78 char = D;code = 68 char = E;code = 69 char = A;code = 65 char = );code = 41 char = ,;code = 44 char = ;code = 32 char = N;code = 78 char = -;code = 45 char = n;code = 110 char = i;code = 105 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = s;code = 115 char = o;code = 111 char = p;code = 112 char = y;code = 121 char = r;code = 114 char = r;code = 114 char = o;code = 111 char = l;code = 108 char = i;code = 105 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = e;code = 101 char = ;code = 32 char = (;code = 40 char = N;code = 78 char = P;code = 80 char = Y;code = 89 char = R;code = 82 char = );code = 41 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = N;code = 78 char = -;code = 45 char = n;code = 110 char = i;code = 105 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = s;code = 115 char = o;code = 111 char = d;code = 100 char = i;code = 105 char = e;code = 101 char = t;code = 116 char = h;code = 104 char = a;code = 97 char = n;code = 110 char = o;code = 111 char = l;code = 108 char = a;code = 97 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = e;code = 101 char = ;code = 32 char = (;code = 40 char = N;code = 78 char = D;code = 68 char = E;code = 69 char = L;code = 76 char = A;code = 65 char = );code = 41 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = 1;code = 49 char = 8;code = 56 char = 0;code = 48 char = 0;code = 48 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = S;code = 83 char = p;code = 112 char = r;code = 114 char = a;code = 97 char = g;code = 103 char = u;code = 117 char = e;code = 101 char = -;code = 45 char = D;code = 68 char = a;code = 97 char = w;code = 119 char = l;code = 108 char = e;code = 101 char = y;code = 121 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = y;code = 121 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = f;code = 102 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = -;code = 45 char = s;code = 115 char = p;code = 112 char = e;code = 101 char = c;code = 99 char = i;code = 105 char = f;code = 102 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = (;code = 40 char = t;code = 116 char = i;code = 105 char = m;code = 109 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = a;code = 97 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = l;code = 108 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = u;code = 117 char = m;code = 109 char = o;code = 111 char = u;code = 117 char = r;code = 114 char = );code = 41 char = ;code = 32 char = b;code = 98 char = y;code = 121 char = ;code = 32 char = C;code = 67 char = o;code = 111 char = x;code = 120 char = ';code = 39 char = s;code = 115 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = p;code = 112 char = o;code = 111 char = r;code = 114 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = h;code = 104 char = a;code = 97 char = z;code = 122 char = a;code = 97 char = r;code = 114 char = d;code = 100 char = s;code = 115 char = ;code = 32 char = m;code = 109 char = o;code = 111 char = d;code = 100 char = e;code = 101 char = l;code = 108 char = .;code = 46 char = ;code = 32 char = <;code = 60 char = b;code = 98 char = >;code = 62 char = T;code = 84 char = H;code = 72 char = E;code = 69 char = ;code = 32 char = M;code = 77 char = O;code = 79 char = D;code = 68 char = E;code = 69 char = L;code = 76 char = ;code = 32 char = R;code = 82 char = E;code = 69 char = V;code = 86 char = E;code = 69 char = A;code = 65 char = L;code = 76 char = E;code = 69 char = D;code = 68 char = ;code = 32 char = A;code = 65 char = ;code = 32 char = L;code = 76 char = I;code = 73 char = N;code = 78 char = E;code = 69 char = A;code = 65 char = R;code = 82 char = ;code = 32 char = R;code = 82 char = E;code = 69 char = L;code = 76 char = A;code = 65 char = T;code = 84 char = I;code = 73 char = O;code = 79 char = N;code = 78 char = S;code = 83 char = H;code = 72 char = I;code = 73 char = P;code = 80 char = ;code = 32 char = B;code = 66 char = E;code = 69 char = T;code = 84 char = W;code = 87 char = E;code = 69 char = E;code = 69 char = N;code = 78 char = ;code = 32 char = D;code = 68 char = A;code = 65 char = I;code = 73 char = L;code = 76 char = Y;code = 89 char = ;code = 32 char = E;code = 69 char = X;code = 88 char = P;code = 80 char = O;code = 79 char = S;code = 83 char = U;code = 85 char = R;code = 82 char = E;code = 69 char = ;code = 32 char = T;code = 84 char = O;code = 79 char = ;code = 32 char = L;code = 76 char = O;code = 79 char = W;code = 87 char = ;code = 32 char = L;code = 76 char = E;code = 69 char = V;code = 86 char = E;code = 69 char = L;code = 76 char = S;code = 83 char = ;code = 32 char = O;code = 79 char = F;code = 70 char = ;code = 32 char = N;code = 78 char = -;code = 45 char = N;code = 78 char = I;code = 73 char = T;code = 84 char = R;code = 82 char = O;code = 79 char = S;code = 83 char = A;code = 65 char = M;code = 77 char = I;code = 73 char = N;code = 78 char = E;code = 69 char = ;code = 32 char = A;code = 65 char = N;code = 78 char = D;code = 68 char = ;code = 32 char = T;code = 84 char = I;code = 73 char = M;code = 77 char = E;code = 69 char = ;code = 32 char = T;code = 84 char = O;code = 79 char = ;code = 32 char = D;code = 68 char = E;code = 69 char = A;code = 65 char = T;code = 84 char = H;code = 72 char = ;code = 32 char = W;code = 87 char = I;code = 73 char = T;code = 84 char = H;code = 72 char = ;code = 32 char = L;code = 76 char = I;code = 73 char = V;code = 86 char = E;code = 69 char = R;code = 82 char = ;code = 32 char = T;code = 84 char = U;code = 85 char = M;code = 77 char = O;code = 79 char = U;code = 85 char = R;code = 82 char = ;code = 32 char = W;code = 87 char = I;code = 73 char = T;code = 84 char = H;code = 72 char = I;code = 73 char = N;code = 78 char = ;code = 32 char = T;code = 84 char = H;code = 72 char = E;code = 69 char = ;code = 32 char = D;code = 68 char = O;code = 79 char = S;code = 83 char = E;code = 69 char = ;code = 32 char = R;code = 82 char = A;code = 65 char = N;code = 78 char = G;code = 71 char = E;code = 69 char = ;code = 32 char = I;code = 73 char = N;code = 78 char = V;code = 86 char = E;code = 69 char = S;code = 83 char = T;code = 84 char = I;code = 73 char = G;code = 71 char = A;code = 65 char = T;code = 84 char = E;code = 69 char = D;code = 68 char = :;code = 58 char = ;code = 32 char = <;code = 60 char = /;code = 47 char = b;code = 98 char = >;code = 62 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = d;code = 100 char = i;code = 105 char = v;code = 118 char = i;code = 105 char = d;code = 100 char = u;code = 117 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = d;code = 100 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = u;code = 117 char = l;code = 108 char = t;code = 116 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = p;code = 112 char = o;code = 111 char = r;code = 114 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = c;code = 99 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = l;code = 108 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = u;code = 117 char = m;code = 109 char = o;code = 111 char = u;code = 117 char = r;code = 114 char = -;code = 45 char = f;code = 102 char = r;code = 114 char = e;code = 101 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = v;code = 118 char = i;code = 105 char = v;code = 118 char = a;code = 97 char = l;code = 108 char = .;code = 46 char = ;code = 32 char = T;code = 84 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = n;code = 110 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = e;code = 101 char = s;code = 115 char = t;code = 116 char = a;code = 97 char = b;code = 98 char = l;code = 108 char = i;code = 105 char = s;code = 115 char = h;code = 104 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = f;code = 102 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = r;code = 114 char = e;code = 101 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = d;code = 100 char = i;code = 105 char = v;code = 118 char = i;code = 105 char = d;code = 100 char = u;code = 117 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = c;code = 99 char = a;code = 97 char = r;code = 114 char = c;code = 99 char = i;code = 105 char = n;code = 110 char = o;code = 111 char = g;code = 103 char = e;code = 101 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = e;code = 101 char = l;code = 108 char = l;code = 108 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = f;code = 102 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = i;code = 105 char = r;code = 114 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = b;code = 98 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = .;code = 46 char = ;code = 32 char = N;code = 78 char = D;code = 68 char = E;code = 69 char = A;code = 65 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = 4;code = 52 char = 0;code = 48 char = ;code = 32 char = t;code = 116 char = i;code = 105 char = m;code = 109 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = m;code = 109 char = o;code = 111 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = N;code = 78 char = D;code = 68 char = E;code = 69 char = L;code = 76 char = A;code = 65 char = .;code = 46 char = ;code = 32 char = E;code = 69 char = x;code = 120 char = t;code = 116 char = r;code = 114 char = a;code = 97 char = p;code = 112 char = o;code = 111 char = l;code = 108 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = N;code = 78 char = -;code = 45 char = n;code = 110 char = i;code = 105 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = s;code = 115 char = a;code = 97 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = e;code = 101 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = l;code = 108 char = e;code = 101 char = v;code = 118 char = e;code = 101 char = l;code = 108 char = s;code = 115 char = ;code = 32 char = l;code = 108 char = o;code = 111 char = w;code = 119 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = u;code = 117 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = m;code = 109 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = v;code = 118 char = e;code = 101 char = a;code = 97 char = l;code = 108 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = o;code = 111 char = n;code = 110 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = u;code = 117 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = -;code = 45 char = s;code = 115 char = p;code = 112 char = e;code = 101 char = c;code = 99 char = i;code = 105 char = f;code = 102 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = l;code = 108 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = u;code = 117 char = m;code = 109 char = o;code = 111 char = u;code = 117 char = r;code = 114 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = p;code = 112 char = a;code = 97 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = a;code = 97 char = t;code = 116 char = ;code = 32 char = a;code = 97 char = c;code = 99 char = h;code = 104 char = i;code = 105 char = e;code = 101 char = v;code = 118 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = b;code = 98 char = y;code = 121 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = q;code = 113 char = u;code = 117 char = i;code = 105 char = v;code = 118 char = a;code = 97 char = l;code = 108 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = u;code = 117 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = m;code = 109 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = d;code = 100 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = n;code = 110 char = g;code = 103 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = I;code = 73 char = n;code = 110 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = t;code = 116 char = ;code = 32 char = a;code = 97 char = d;code = 100 char = v;code = 118 char = a;code = 97 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = f;code = 102 char = u;code = 117 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = u;code = 117 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = c;code = 99 char = a;code = 97 char = r;code = 114 char = c;code = 99 char = i;code = 105 char = n;code = 110 char = o;code = 111 char = g;code = 103 char = e;code = 101 char = n;code = 110 char = -;code = 45 char = i;code = 105 char = n;code = 110 char = d;code = 100 char = u;code = 117 char = c;code = 99 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = l;code = 108 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = u;code = 117 char = m;code = 109 char = o;code = 111 char = u;code = 117 char = r;code = 114 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = d;code = 100 char = i;code = 105 char = d;code = 100 char = ;code = 32 char = n;code = 110 char = o;code = 111 char = t;code = 116 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = t;code = 116 char = r;code = 114 char = i;code = 105 char = b;code = 98 char = u;code = 117 char = t;code = 116 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = l;code = 108 char = o;code = 111 char = n;code = 110 char = g;code = 103 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = o;code = 111 char = v;code = 118 char = e;code = 101 char = r;code = 114 char = a;code = 97 char = l;code = 108 char = l;code = 108 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = v;code = 118 char = i;code = 105 char = v;code = 118 char = a;code = 97 char = l;code = 108 char = ,;code = 44 char = ;code = 32 char = d;code = 100 char = u;code = 117 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = p;code = 112 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = t;code = 116 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = ,;code = 44 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = b;code = 98 char = a;code = 97 char = b;code = 98 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = d;code = 100 char = e;code = 101 char = p;code = 112 char = e;code = 101 char = n;code = 110 char = d;code = 100 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = c;code = 99 char = a;code = 97 char = u;code = 117 char = s;code = 115 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = a;code = 97 char = t;code = 116 char = h;code = 104 char = .;code = 46 char = ;code = 32 char = T;code = 84 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = d;code = 100 char = a;code = 97 char = t;code = 116 char = a;code = 97 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = u;code = 117 char = s;code = 115 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = p;code = 112 char = p;code = 112 char = o;code = 111 char = r;code = 114 char = t;code = 116 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = a;code = 97 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = q;code = 113 char = u;code = 117 char = a;code = 97 char = s;code = 115 char = i;code = 105 char = -;code = 45 char = t;code = 116 char = h;code = 104 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = h;code = 104 char = o;code = 111 char = l;code = 108 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = m;code = 109 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = ';code = 39 char = n;code = 110 char = o;code = 111 char = ;code = 32 char = o;code = 111 char = b;code = 98 char = s;code = 115 char = e;code = 101 char = r;code = 114 char = v;code = 118 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = e;code = 101 char = f;code = 102 char = f;code = 102 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = ;code = 32 char = l;code = 108 char = e;code = 101 char = v;code = 118 char = e;code = 101 char = l;code = 108 char = ';code = 39 char = .;code = 46 char = <;code = 60 char = b;code = 98 char = r;code = 114 char = /;code = 47 char = >;code = 62 result sql = Data from an experiment on the single and combination effects of very low doses of N-nitrosodiethylamine (NDEA), N-nitrosopyrrolidine (NPYR) and N-nitrosodiethanolamine (NDELA) in 1800 male Sprague-Dawley rats were analysed for age-specific incidence (time to death with liver tumour) by Cox's proportional hazards model. THE MODEL REVEALED A LINEAR RELATIONSHIP BETWEEN DAILY EXPOSURE TO LOW LEVELS OF N-NITROSAMINE AND TIME TO DEATH WITH LIVER TUMOUR WITHIN THE DOSE RANGE INVESTIGATED: an increase in individual dose resulted in a proportional decrease in liver tumour-free survival. The finding was established for the three individual carcinogens as well as for their combination. NDEA was 40 times more active than NDELA. Extrapolation to N-nitrosamine exposure levels lower than those used in the experiment revealed only a minor reduction in age-specific liver tumour incidence compared to that achieved by an equivalent reduction within the experimental dose range. In rats at advanced age a further reduction in carcinogen-induced liver tumour incidence did not contribute to longer overall survival, due to competitive, probably independent causes of death. The data thus support the idea of a quasi-threshold in terms of a 'no observed effect level'.
Publication: IARC Sci. Publ. 1991 ;(105)::311-7.
Publication Date: 1991
Study Author(s): Berger, M R;Schmähl, D;Edler, L;
Institution: Institute of Toxicology and Chemotherapy, German Cancer Research Centre, Heidelberg.
Shortcut link to this study:
Data from an experiment on the single and combination effects of very low doses of N-nitrosodiethylamine (NDEA), N-nitrosopyrrolidine (NPYR) and N-nitrosodiethanolamine (NDELA) in 1800 male Sprague-Dawley rats were analysed for age-specific incidence (time to death with liver tumour) by Cox's proportional hazards model. THE MODEL REVEALED A LINEAR RELATIONSHIP BETWEEN DAILY EXPOSURE TO LOW LEVELS OF N-NITROSAMINE AND TIME TO DEATH WITH LIVER TUMOUR WITHIN THE DOSE RANGE INVESTIGATED: an increase in individual dose resulted in a proportional decrease in liver tumour-free survival. The finding was established for the three individual carcinogens as well as for their combination. NDEA was 40 times more active than NDELA. Extrapolation to N-nitrosamine exposure levels lower than those used in the experiment revealed only a minor reduction in age-specific liver tumour incidence compared to that achieved by an equivalent reduction within the experimental dose range. In rats at advanced age a further reduction in carcinogen-induced liver tumour incidence did not contribute to longer overall survival, due to competitive, probably independent causes of death. The data thus support the idea of a quasi-threshold in terms of a 'no observed effect level'.
PMID: 1855870