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Segovis CM, Mueller PS, Rethlefsen ML, LaRusso NF, Litin SC, Tefferi A, Habermann TM.Segovis CM, et al. Among authors: larusso nf.BMC Med Educ. 2007 Jul 12;7:22. doi: 10.1186/1472-6920-7-22.BMC Med Educ. 2007.PMID: 17626625Free PMC article.