Affiliation: | (1) Department of Surgery, Bell-land General Hospital, 500-3, Higashiyama, Naka-ku, Sakai 5998247, Japan;(2) Department of Surgery, Minamiosaka Hospital, Osaka , Japan;(3) Department of Surgery, Kariya Toyota General Hospital, Kariya, Japan;(4) Department of Gastroenterological Surgery, Osaka City General Hospital, Osaka, Japan |