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Qaseem A, Barry MJ, Humphrey LL, Forciea MA; Clinical Guidelines Committee of the American College of Physicians; Fitterman N, Horwitch C, Kansagara D, McLean RM, Wilt TJ.Qaseem A, et al.Ann Intern Med. 2017 Feb 21;166(4):279-290. doi: 10.7326/M16-1860. Epub 2017 Jan 3.Ann Intern Med. 2017.PMID: 28055075Free article.
Qaseem A, Vijan S, Snow V, Cross JT, Weiss KB, Owens DK; Clinical Efficacy Assessment Subcommittee of the American College of Physicians.Qaseem A, et al. Among authors: vijan s.Ann Intern Med. 2007 Sep 18;147(6):417-22. doi: 10.7326/0003-4819-147-6-200709180-00012.Ann Intern Med. 2007.PMID: 17876024Free article.
Heisler M, Vijan S, Anderson RM, Ubel PA, Bernstein SJ, Hofer TP.Heisler M, et al. Among authors: vijan s.J Gen Intern Med. 2003 Nov;18(11):893-902. doi: 10.1046/j.1525-1497.2003.21132.x.J Gen Intern Med. 2003.PMID: 14687274Free PMC article.