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Kelley AS, Ettner SL, Morrison RS, Du Q, Sarkisian CA.Kelley AS, et al. Among authors: morrison rs.J Gen Intern Med. 2012 Jul;27(7):794-800. doi: 10.1007/s11606-012-2013-9. Epub 2012 Mar 2.J Gen Intern Med. 2012.PMID: 22382455Free PMC article.