TY - STAND AU - S. Suissa AU - E. Moodie AU - S. Dell'Aniello BT - Pharmacoepidemiol Drug Saf DO - 10.1002/pds.4107 M1 - 4 PY - 2017 SP - 459 EP - 468 T2 - Pharmacoepidemiol Drug Saf TI - Prevalent new-user cohort designs for comparative drug effect studies by time-conditional propensity scores VL - 26 SN - 1053-8569 ER -