We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleProblems due to small samples and sparse data in conditional logistic regression analysis.AuthorsGreenland S; Schwartzbaum JA; Finkle WDPublicationAmerican journal of epidemiology, 2000, Vol 151, Issue 5, p531ISSN0002-9262Publication typearticleDOI10.1093/oxfordjournals.aje.a010240