We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleEvaluating medication effects outside of clinical trials: new-user designs.AuthorsRay WAPublicationAmerican journal of epidemiology, 2003, Vol 158, Issue 9, p915ISSN0002-9262Publication typearticleDOI10.1093/aje/kwg231