00618nas a2200241   4500000000100000000000100001008004100002100001100043700001600054700001400070700001200084700001400096700001200110700001300122700001800135700001600153700001500169700001300184245014600197300001200343490000700355022001400362       2018                            d1 aS. Pye1 aT. Sheppard1 aR. Joseph1 aM. Lunt1 aN. Girard1 aJ. Haas1 aD. Bates1 aD. Buckeridge1 aT. van Staa1 aR. Tamblyn1 aW. Dixon00aAssumptions made when preparing drug exposure data for analysis have an impact on results: An unreported step in pharmacoepidemiology studies  a781-7880 v27  a1053-8569