McColl, 1997, Thromb Haemost, 78, 1183, 10.1055/s-0038-1657712
Kearon, 1998, Ann Intern Med, 128, 663, 10.7326/0003-4819-128-8-199804150-00011
Anderson, 1993, Ann Intern Med, 118, 25, 10.7326/0003-4819-118-1-199301010-00005
Davidson, 1992, Ann Intern Med, 117, 735, 10.7326/0003-4819-117-9-735
Cockett, 1967, Br Med J, 2, 14, 10.1136/bmj.2.5543.14
Lee, 1990, Obstet Gynecol Surv, 45, 290, 10.1097/00006254-199005000-00003
Wheeler, 1994, Arch Intern Med, 154, 1921, 10.1001/archinte.154.17.1921
Wells, 1995, Lancet, 345, 1326, 10.1016/S0140-6736(95)92535-X
DerSimonian, 1986, Controlled Clin Trials, 7, 177, 10.1016/0197-2456(86)90046-2
Mueller, 1969, Obstet Gynecol, 34, 874
Aaro, 1971, Am J Obstet Gynecol, 109, 1128, 10.1016/0002-9378(71)90651-X
Duncan, 1971, J Obstet Gynaecol Br Commonw, 78, 904, 10.1111/j.1471-0528.1971.tb00202.x
Treffers, 1983, Int J Gynaecol Obstet, 21, 327, 10.1016/0020-7292(83)90024-3
Bergqvist, 1983, Acta Obstet Gynecol Scand, 62, 443, 10.3109/00016348309154217
Bergqvist, 1983, Acta Obstet Gynecol Scand, 62, 449, 10.3109/00016348309154218
Kierkegaard, 1983, Act Obstet Gynecol Scand, 62, 239, 10.3109/00016348309155799
Lindhagen, 1986, Br J Obstet Gynaecol, 93, 348
Bergqvist, 1990, Br J Obstet Gynaecol, 338, 341
Hull, 1990, Ann Intern Med, 112, 663, 10.7326/0003-4819-112-9-663
Polak, 1991, Am J Obstet Gynecol, 165, 625, 10.1016/0002-9378(91)90297-5
de Boer, 1992, Thromb Haemost, 67, 4, 10.1055/s-0038-1648129
Ginsberg, 1992, Thromb Haemost, 67, 519, 10.1055/s-0038-1648485
Aburahma, 1993, W V Med J, 89, 445
James, 1996, Cardiovasc Surg, 4, 777, 10.1016/S0967-2109(96)00042-7
Husni, 1967, Am J Obstet Gynecol, 97, 901, 10.1016/0002-9378(67)90514-5
Macklon, 1996, Scot Med J, 41, 83, 10.1177/003693309604100305
Girling, 1996, Curr Opin Obstet Gynecol, 8, 458, 10.1097/00001703-199612000-00013
Skudder, 1990, J Cardiovasc Surg, 31, 748
Macklon, 1997, Br J Obstet Gynaecol, 104, 198, 10.1111/j.1471-0528.1997.tb11044.x
Nicholas, 1985, Surg Gynecol Obstet, 161, 133
Didolkar, 1983, Obstet Gynecol, 61, 363
May, 1957, Angiology, 8, 419, 10.1177/000331975700800505
Shapiro, 1997, J Clin Epidemiol, 50, 223, 10.1016/S0895-4356(96)00360-5
Egger, 1998, Br Med J, 316, 140, 10.1136/bmj.316.7125.140
