The increased risk of venous thromboembolism and the use of third generation progestagens: Role of bias in observational research

World distribution of factor V Leiden

David C. Rees, Michael J. Cox, J. B. Clegg · The Lancet · 1995 · 1.2K citations

Medicine, Genetics, Genetic Epidemiology +10

Increased risk of venous thrombosis in oral-contraceptive users who are carriers of factor V Leiden mutation

Jan P. Vandenbroucke, Ted Koster, Frits R. Rosendaal et al. · The Lancet · 1994 · 1.1K citations

Medicine, Hematology, Obstetrics +17

Risk of idiopathic cardiovascular death and rionfatal venous thromboembolism in women using oral contraceptives with differing progestagen components

Hershel Jick, Susan S. Jick, Michael W. Myers et al. · The Lancet · 1995 · 735 citations

Medicine, Endocrinology, Obstetrics +17

Third generation oral contraceptives and risk of venous thromboembolic disorders: an international case-control study

Walter O. Spitzer, Michael A. O. Lewis, Lothar Heinemann et al. · BMJ · 1996 · 596 citations · Full text

Medicine, Gynecology, Obstetrics +15

Venous thromboembolic disease and combined oral contraceptives: results of international multicentre case-control study

The Lancet · 1995 · 507 citations · Full text

Medicine, Gynecology, Obstetrics +16