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Yujiro Itazaki, Hironori Tsujimoto, Nozomi Ito, Hiroyuki Horiguchi, Shinsuke Nomura, Kyohei Kanematsu, Shuichi Hiraki, Suefumi Aosasa, Junji Yamamoto, Kazuo Hase 
World J Gastrointest Surg 8(2):173-178. Published online Feb 27, 2016. doi: 10.4240/wjgs.v8.i2.173