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Whitlock EL, Diaz-Ramirez LG, Glymour MM, Boscardin WJ, Covinsky KE, Smith AK.Whitlock EL, et al.JAMA Intern Med. 2017 Aug 1;177(8):1146-1153. doi: 10.1001/jamainternmed.2017.1622.JAMA Intern Med. 2017.PMID: 28586818Free PMC article.