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Hahn KA, Ohman-Strickland PA, Cohen DJ, Piasecki AK, Crosson JC, Clark EC, Crabtree BF.Hahn KA, et al. Among authors: crabtree bf.Am J Med Qual. 2011 Jul-Aug;26(4):272-7. doi: 10.1177/1062860610392365. Epub 2011 Jan 25.Am J Med Qual. 2011.PMID: 21266596Free PMC article.