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Connelly MT, Sullivan AM, Peters AS, Clark-Chiarelli N, Zotov N, Martin N, Simon SR, Singer JD, Block SD.Connelly MT, et al. Among authors: singer jd.J Gen Intern Med. 2003 Mar;18(3):159-69. doi: 10.1046/j.1525-1497.2003.01208.x.J Gen Intern Med. 2003.PMID: 12648246Free PMC article.