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Alexandre Zanchenko Fonseca, Marcelo Augusto Fontenelle Ribeiro Jr, Orlando Contrucci, Alexandre Pompeo, Adriana Orsetti, Herico Arsie Neto 
World J Gastrointest Surg 3(9):138-141. Published online Sep 27, 2011. doi: 10.4240/wjgs.v3.i9.138