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Sheffield KM, Peek MK.Sheffield KM, et al.Am J Epidemiol. 2011 Aug 1;174(3):274-83. doi: 10.1093/aje/kwr074. Epub 2011 May 27.Am J Epidemiol. 2011.PMID: 21622948Free PMC article.
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Riall TS, Sheffield KM, Kuo YF, Townsend CM Jr, Goodwin JS.Riall TS, et al. Among authors: sheffield km.J Am Geriatr Soc. 2011 Apr;59(4):647-54. doi: 10.1111/j.1532-5415.2011.03353.x. Epub 2011 Mar 31.J Am Geriatr Soc. 2011.PMID: 21453378Free PMC article.
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Sheffield KM, Han Y, Kuo YF, Riall TS, Goodwin JS.Sheffield KM, et al.JAMA Intern Med. 2013 Apr 8;173(7):542-50. doi: 10.1001/jamainternmed.2013.2912.JAMA Intern Med. 2013.PMID: 23478992Free PMC article.