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Muaidi QI, Nicholson LL, Refshauge KM, Eisenhuth JP.Muaidi QI, et al.Med Eng Phys. 2007 Nov;29(9):1035-42. doi: 10.1016/j.medengphy.2006.10.009. Epub 2006 Nov 22.Med Eng Phys. 2007.PMID: 17123859