We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePropensity scores for rare outcomes and common treatments.AuthorsLongstreth WT Jr; Fahrenbruch CE; Koepsell TDPublicationAnnals of internal medicine, 2003, Vol 139, Issue 2, p152ISSN1539-3704Publication typearticleDOI10.7326/0003-4819-139-2-200307150-00018