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Barnes DE, Mehta KM, Boscardin WJ, Fortinsky RH, Palmer RM, Kirby KA, Landefeld CS.Barnes DE, et al.J Gen Intern Med. 2013 Feb;28(2):261-8. doi: 10.1007/s11606-012-2226-y. Epub 2012 Sep 30.J Gen Intern Med. 2013.PMID: 23054919Free PMC article.