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Pasnoor M, Dimachkie MM, Kluding P, Barohn RJ.Pasnoor M, et al.Neurol Clin. 2013 May;31(2):425-45. doi: 10.1016/j.ncl.2013.02.004. Epub 2013 Mar 15.Neurol Clin. 2013.PMID: 23642717Free PMC article.Review.