%0 Journal Article %K Drug Exposure Definition %K Electronic Health Records %K Free Text %K Misclassification %K Narrative Prescribing Instructions %K Opioids %K pharmacoepidemiology %B Pharmacoepidemiol Drug Saf %D 2023 %G eng %M 36718594 %R 10.1002/pds.5595 %T "Take up to eight tablets per day": Incorporating free-text medication instructions into a transparent and reproducible process for preparing drug exposure data for pharmacoepidemiology %7 2023/02/01 %@ 1053-8569