title: A comparison of data sources for drug exposure ascertainment in pharmacoepidemiologic studies with emphasis on self-reported information.
authors.affiliation: Research Triangle Institute, Health and Social Policy Division, 3040 Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC 27709-2194, USA.
authors.forename: S L
authors.initials: SL
authors.lastname: West