Teruo Komokata1, Bibek Aryal2, Nobuhiro Tada2, Kensuke Nuruki2. 1. Department of Surgery, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan. Electronic address: komokata.teruo.je@mail.hosp.go.jp. 2. Department of Surgery, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan.