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Vaughan JI, Jeffery HE, Raynes-Greenow C, Gordon A, Hirst J, Hill DA, Arbuckle S.Vaughan JI, et al. Among authors: gordon a.BMC Med Educ. 2012 Nov 6;12:108. doi: 10.1186/1472-6920-12-108.BMC Med Educ. 2012.PMID: 23131137Free PMC article.