TY - STAND AU - C. Vasilakis AU - S. Jick AU - H. Jick BT - Contraception M1 - 2 PY - 1999 SP - 79 EP - 83 T2 - Contraception TI - The risk of venous thromboembolism in users of postcoital contraceptive pills VL - 59 SN - 0010-7824 (Print) 0010-7824 ER -