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Goodwin JS, Singh A, Reddy N, Riall TS, Kuo YF.Goodwin JS, et al.Arch Intern Med. 2011 Aug 8;171(15):1335-43. doi: 10.1001/archinternmed.2011.212. Epub 2011 May 9.Arch Intern Med. 2011.PMID: 21555653Free PMC article.
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.