title: Do oral contraceptive pills really protect against venous thromboembolism, especially in polycystic ovary syndrome patients? Prescription bias or not?
authors: Department of Obstetrics and Gynecology, Hacettepe University Faculty of Medicine, 06100, Sıhhiye, Ankara 06100 Turkey. Electronic address: taner.kasapoglu@hacettepe.edu.tr.
authors: Taner
authors: T
authors: Kasapoglu
mesh_terms: D005260:Female; D006801:Humans; D011085:Polycystic Ovary Syndrome / Q000453:epidemiology*; D054556:Venous Thromboembolism / Q000453:epidemiology*