| Affiliation: | 1. Department of Gastroenterological Surgery, Higashiosaka City General Hospital, , Osaka, Japan;2. Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, , Osaka, Japan;3. Department of Surgery, Osaka General Medical Center, , Osaka, Japan;4. Department of Surgery, Sakai City Hospital, , Osaka, Japan;5. Department of Surgery, Kinki Central Hospital, , Hyogo, Japan;6. Department of Surgery, NTT West Osaka Hospital, , Osaka, Japan;7. Department of Surgery, Kansai Rosai Hospital, , Hyogo, Japan |
