We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleIdentifying confounding by indication through blinded prospective review.AuthorsJohnston SCPublicationAmerican journal of epidemiology, 2001, Vol 154, Issue 3, p276ISSN0002-9262Publication typearticleDOI10.1093/aje/154.3.276