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Darrat YH, Guirgis H, El-Hamdani MO, Cansino S, Gress TW, Studeny M.Darrat YH, et al.South Med J. 2012 Nov;105(11):585-90. doi: 10.1097/SMJ.0b013e31826f01c8.South Med J. 2012.PMID: 23128801