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Hechavarria D, Dewilde A, Braunhut S, Levin M, Kaplan DL.Hechavarria D, et al. Among authors: levin m.Med Eng Phys. 2010 Nov;32(9):1065-73. doi: 10.1016/j.medengphy.2010.07.010. Epub 2010 Aug 13.Med Eng Phys. 2010.PMID: 20708956Free PMC article.