[1] NTT West Osaka Hospital,Department of Surgery
[2] Yokohama Municipal Citizen’s Hospital,Division of Gastroenterological Surgery
[3] Hiroshima Prefectural Hospital,Department of Gastroenterological, Breast and Transplant Surgery
[4] Hiroshima University,Department of Gastroenterological and Transplant Surgery, Institute of Biomedical and Health Sciences
[5] Nagoya University Graduate School of Medicine,Department of Gastroenterological Surgery
[6] Kenporen Osaka Central Hospital,Department of Surgery
[7] Kawasaki Medical School,Department of Digestive Surgery
[8] Hakodate Goryoukaku Hospital,Department of Surgery
[9] Yokohama City University Medical Center,Department of Surgery, Gastroenterological Center
[10] The Jikei University School of Medicine,Department of Surgery