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Gundara JS, Wang F, Alvarado-Bachmann R, Williams N, Choi J, Gananadha S, Gill AJ, Hugh TJ, Samra JS. Am J Surg. 2013 Oct;206(4):518-25. doi: 10.1016/ j.amjsurg.2013.01.040. Epub 2013 Jun 27.