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1 Department of Surgery, Gastric Surgery Division, National Cancer Center Hospital 1-1, Tsukiji 5-chome, Chuo-ku, Tokyo 104-0045, Japan. msasako@gan2.ncc.go.jp
1 Department of Surgery, Gastric Surgery Division, National Cancer Center Hospital 1-1, Tsukiji 5-chome, Chuo-ku, Tokyo 104-0045, Japan. msasako@gan2.ncc.go.jp