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Cheung WJ, Dudek N, Wood TJ, Frank JR.Cheung WJ, et al. Among authors: wood tj.J Grad Med Educ. 2016 Oct;8(4):601-604. doi: 10.4300/JGME-D-15-00505.1.J Grad Med Educ. 2016.PMID: 27777675Free PMC article.