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result sql = Efficacy of low- molecular- weight- heparin versus vitamin K antagonists for long term treatment of cancer-associated venous thromboembolism in adults: a systematic review of randomized controlled trials.
Efficacy of low- molecular- weight- heparin versus vitamin K antagonists for long term treatment of cancer-associated venous thromboembolism in adults: a systematic review of randomized controlled trials.
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char = a;code = 97
char = s;code = 115
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = f;code = 102
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = M;code = 77
char = E;code = 69
char = D;code = 68
char = L;code = 76
char = I;code = 73
char = N;code = 78
char = E;code = 69
char = ,;code = 44
char = ;code = 32
char = E;code = 69
char = M;code = 77
char = B;code = 66
char = A;code = 65
char = S;code = 83
char = E;code = 69
char = ,;code = 44
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = R;code = 82
char = e;code = 101
char = g;code = 103
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = T;code = 84
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = M;code = 77
char = e;code = 101
char = d;code = 100
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = -;code = 45
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = O;code = 79
char = V;code = 86
char = I;code = 73
char = D;code = 68
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = f;code = 102
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = R;code = 82
char = i;code = 105
char = s;code = 115
char = k;code = 107
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = z;code = 122
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = R;code = 82
char = C;code = 67
char = T;code = 84
char = s;code = 115
char = );code = 41
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = o;code = 111
char = r;code = 114
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = a;code = 97
char = b;code = 98
char = o;code = 111
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = -;code = 45
char = C;code = 67
char = o;code = 111
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = H;code = 72
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = b;code = 98
char = o;code = 111
char = o;code = 111
char = k;code = 107
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = S;code = 83
char = y;code = 121
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = R;code = 82
char = e;code = 101
char = v;code = 118
char = i;code = 105
char = e;code = 101
char = w;code = 119
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = I;code = 73
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = v;code = 118
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = y;code = 121
char = m;code = 109
char = p;code = 112
char = t;code = 116
char = o;code = 111
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = V;code = 86
char = T;code = 84
char = E;code = 69
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = u;code = 117
char = r;code = 114
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = u;code = 117
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = o;code = 111
char = a;code = 97
char = g;code = 103
char = u;code = 117
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 = p;code = 112
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = o;code = 111
char = d;code = 100
char = .;code = 46
char = ;code = 32
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 = v;code = 118
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = k;code = 107
char = ;code = 32
char = (;code = 40
char = R;code = 82
char = R;code = 82
char = );code = 41
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = e;code = 101
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 = 9;code = 57
char = 5;code = 53
char = %;code = 37
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = f;code = 102
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 = i;code = 105
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = C;code = 67
char = I;code = 73
char = s;code = 115
char = );code = 41
char = .;code = 46
char = ;code = 32
char = P;code = 80
char = o;code = 111
char = o;code = 111
char = l;code = 108
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = m;code = 109
char = e;code = 101
char = n;code = 110
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 = c;code = 99
char = a;code = 97
char = l;code = 108
char = c;code = 99
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = -;code = 45
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 = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = x;code = 120
char = e;code = 101
char = d;code = 100
char = -;code = 45
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 = m;code = 109
char = o;code = 111
char = d;code = 100
char = e;code = 101
char = l;code = 108
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = >;code = 62
char = R;code = 82
char = E;code = 69
char = S;code = 83
char = U;code = 85
char = L;code = 76
char = T;code = 84
char = S;code = 83
char = ;code = 32
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
char = F;code = 70
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = l;code = 108
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = ;code = 32
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 = l;code = 108
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = r;code = 114
char = i;code = 105
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = l;code = 108
char = l;code = 108
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 = L;code = 76
char = M;code = 77
char = W;code = 87
char = H;code = 72
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = V;code = 86
char = K;code = 75
char = A;code = 65
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
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char = s;code = 115
char = e;code = 101
char = c;code = 99
char = o;code = 111
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char = d;code = 100
char = a;code = 97
char = r;code = 114
char = y;code = 121
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char = p;code = 112
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = n;code = 110
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 = V;code = 86
char = T;code = 84
char = E;code = 69
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = o;code = 111
char = l;code = 108
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = R;code = 82
char = R;code = 82
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = V;code = 86
char = T;code = 84
char = E;code = 69
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = u;code = 117
char = r;code = 114
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 5;code = 53
char = 3;code = 51
char = ;code = 32
char = (;code = 40
char = 9;code = 57
char = 5;code = 53
char = %;code = 37
char = ;code = 32
char = C;code = 67
char = I;code = 73
char = :;code = 58
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 3;code = 51
char = 6;code = 54
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 7;code = 55
char = 6;code = 54
char = ;;code = 59
char = ;code = 32
char = p;code = 112
char = =;code = 61
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 7;code = 55
char = );code = 41
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = o;code = 111
char = l;code = 108
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = R;code = 82
char = R;code = 82
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = j;code = 106
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = b;code = 98
char = l;code = 108
char = e;code = 101
char = e;code = 101
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 = 0;code = 48
char = .;code = 46
char = 9;code = 57
char = 8;code = 56
char = ;code = 32
char = (;code = 40
char = 9;code = 57
char = 5;code = 53
char = %;code = 37
char = ;code = 32
char = C;code = 67
char = I;code = 73
char = :;code = 58
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 4;code = 52
char = 9;code = 57
char = -;code = 45
char = 1;code = 49
char = .;code = 46
char = 9;code = 57
char = 3;code = 51
char = ,;code = 44
char = ;code = 32
char = p;code = 112
char = =;code = 61
char = 0;code = 48
char = .;code = 46
char = 9;code = 57
char = 5;code = 53
char = );code = 41
char = .;code = 46
char = ;code = 32
char = M;code = 77
char = i;code = 105
char = n;code = 110
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = b;code = 98
char = l;code = 108
char = e;code = 101
char = e;code = 101
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = l;code = 108
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char = o;code = 111
char = n;code = 110
char = ;code = 32
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char = m;code = 109
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char = <;code = 60
char = b;code = 98
char = r;code = 114
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char = >;code = 62
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = >;code = 62
char = C;code = 67
char = O;code = 79
char = N;code = 78
char = C;code = 67
char = L;code = 76
char = U;code = 85
char = S;code = 83
char = I;code = 73
char = O;code = 79
char = N;code = 78
char = S;code = 83
char = ;code = 32
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
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char = h;code = 104
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 = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = i;code = 105
char = e;code = 101
char = w;code = 119
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = g;code = 103
char = g;code = 103
char = e;code = 101
char = s;code = 115
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char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = g;code = 103
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char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
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char = u;code = 117
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char = ;code = 32
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char = ;code = 32
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char = e;code = 101
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = c;code = 99
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char = t;code = 116
char = e;code = 101
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char = f;code = 102
char = i;code = 105
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char = t;code = 116
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = e;code = 101
char = k;code = 107
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
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char = r;code = 114
char = e;code = 101
char = a;code = 97
char = t;code = 116
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = p;code = 112
char = e;code = 101
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char = i;code = 105
char = o;code = 111
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char = s;code = 115
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char = y;code = 121
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = n;code = 110
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 = v;code = 118
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = b;code = 98
char = o;code = 111
char = e;code = 101
char = m;code = 109
char = b;code = 98
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = s;code = 115
char = m;code = 109
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = d;code = 100
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
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result sql = BACKGROUND : Patients with malignancy have a 4-fold increase in the risk of developing a venous thrombosis and a 3-fold increase in risk of bleeding. Both low-molecular-weight-heparin (LMWH) and vitamin K antagonists (VKA) have been used for treatment of cancer-associated thrombosis. However, the best anticoagulation approach remains a matter of debate.

OBJECTIVE : In adult patients with cancer and an acute venous thromboembolic event we sought to determine the rates of recurrent venous thromboembolism (VTE) and major hemorrhage when treated with prolonged LMWH therapy compared to vitamin-K antagonists.

PATIENTS/METHODS : A systematic literature search strategy was used to identify potential trials on MEDLINE, EMBASE, the Cochrane Register of Controlled Trials and Medline in-process using an OVID interface. Risk assessment of bias of randomized controlled trials (RCTs) was performed according to the Cochrane Collaboration-Cochrane Handbook for Systematic Reviews of Interventions. The primary outcome measure was symptomatic VTE recurrence rate during the anticoagulation period. Relative risk (RR) was used as the primary measurement with 95% confidence intervals (CIs). Pooled measurements were calculated using random -effects and fixed-effects model.

RESULTS : Five articles met our inclusion criteria. All compared LMWH and VKA for secondary prevention of VTE. The pooled RR of VTE recurrence was 0.53 (95% CI: 0.36-0.76; p=0.007). The pooled RR of major bleeding was 0.98 (95% CI: 0.49-1.93, p=0.95). Minor bleeding events and all cause mortality were similar between the 2 intervention arms.

CONCLUSIONS : The results of our review suggest that the long term use of LMWH after the acute first week of treatment is superior to VKAs for secondary prevention of venous thromboembolism in adult patients with cancer.

Publication: Thromb. Res. 2009 Apr ;123(6)::837-44.
Publication Date: 2009 Apr
Study Author(s): Louzada, Martha L;Majeed, Habeeb;Wells, Philip S;
Institution: University of Ottawa, Ottawa, Ontario, Canada. [email protected]
Shortcut link to this study:
BACKGROUND : Patients with malignancy have a 4-fold increase in the risk of developing a venous thrombosis and a 3-fold increase in risk of bleeding. Both low-molecular-weight-heparin (LMWH) and vitamin K antagonists (VKA) have been used for treatment of cancer-associated thrombosis. However, the best anticoagulation approach remains a matter of debate.

OBJECTIVE : In adult patients with cancer and an acute venous thromboembolic event we sought to determine the rates of recurrent venous thromboembolism (VTE) and major hemorrhage when treated with prolonged LMWH therapy compared to vitamin-K antagonists.

PATIENTS/METHODS : A systematic literature search strategy was used to identify potential trials on MEDLINE, EMBASE, the Cochrane Register of Controlled Trials and Medline in-process using an OVID interface. Risk assessment of bias of randomized controlled trials (RCTs) was performed according to the Cochrane Collaboration-Cochrane Handbook for Systematic Reviews of Interventions. The primary outcome measure was symptomatic VTE recurrence rate during the anticoagulation period. Relative risk (RR) was used as the primary measurement with 95% confidence intervals (CIs). Pooled measurements were calculated using random -effects and fixed-effects model.

RESULTS : Five articles met our inclusion criteria. All compared LMWH and VKA for secondary prevention of VTE. The pooled RR of VTE recurrence was 0.53 (95% CI: 0.36-0.76; p=0.007). The pooled RR of major bleeding was 0.98 (95% CI: 0.49-1.93, p=0.95). Minor bleeding events and all cause mortality were similar between the 2 intervention arms.

CONCLUSIONS : The results of our review suggest that the long term use of LMWH after the acute first week of treatment is superior to VKAs for secondary prevention of venous thromboembolism in adult patients with cancer.
PMID: 18977517

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