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Metesh Acharya, Nikolaos Panagiotopoulos, Premjithlal Bhaskaran, Charis Kyriakides, Madhava Pai, Nagy Habib 
World J Gastrointest Surg 4(8):199-202. Published online Aug 27, 2012. doi: 10.4240/wjgs.v4.i8.199
Tomoya Tsukada, Tatsuo Nakano, Daisuke Matsui, Shozo Sasaki 
World J Gastrointest Surg 4(8):203-207. Published online Aug 27, 2012. doi: 10.4240/wjgs.v4.i8.203