Department of Gastroenterological Surgery;
Hiroshima University Hospital;
Division of Gastroenterological Surgery;
Yokohama Municipal Citizen’s Hospital;
Department of Gastroenterological;
Breast and Transplant Surgery;
Hiroshima Prefectural Hospital;
Department of Surgery;
Toho University Ohashi Medical Center;
Department of Surgery;
Gifu Municipal Hospital;
Department of General and Gastroentero-logical Surgery;
Osaka Medical College;
Department of Gastroenterological Surgery;
Fukuoka University School of Medicine;
Department of Surgery;
Kobe City Medical Center General Hospital;
Department of Surgery;
Asama General Hospital;
Department of Laboratory Medicine;
the Jikei University School of Medicine;