00382nas a2200145   4500000000100000000000100001008004100002100001400043700001400057700002000071245011200091300001200203490000700215022001400222       2017                            d1 aS. Suissa1 aE. Moodie1 aS. Dell'Aniello00aPrevalent new-user cohort designs for comparative drug effect studies by time-conditional propensity scores  a459-4680 v26  a1053-8569