We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCompared to what? Finding controls for case-control studies.AuthorsGrimes DA; Schulz KFPublicationLancet (London, England), 2005, Vol 365, Issue 9468, p1429ISSN1474-547xPublication typearticleDOI10.1016/S0140-6736(05)66379-9