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Passaro RC, Haley CA, Sanchez H, Vermund SH, Kipp AM.Passaro RC, et al. Among authors: kipp am.BMC Public Health. 2016 Aug 24;16(1):871. doi: 10.1186/s12889-016-3561-4.BMC Public Health. 2016.PMID: 27557857Free PMC article.
Shepherd BE, Blevins M, Vaz LM, Moon TD, Kipp AM, José E, Ferreira FG, Vermund SH.Shepherd BE, et al. Among authors: kipp am.Am J Epidemiol. 2013 Sep 1;178(5):819-28. doi: 10.1093/aje/kwt030. Epub 2013 Jun 19.Am J Epidemiol. 2013.PMID: 23785113Free PMC article.