1. Department of Laboratory Medicine, The Jikei University School of Medicine, Tokyo, Japan.
2. Division of Gastroenterological Surgery, Clinical Oncology Center, Aomori Prefectural Central Hospital, Aomori, Japan.
3. Department of Surgical Oncology, Gifu University, Gifu, Japan.
4. Department of Surgery, Toho University Ohashi Medical Center, Tokyo, Japan.
5. Department of Gastroenterological Surgery, Aichi Cancer Center, Nagoya, Japan.
6. Department of Surgery, Saiseikai Sendai Hospital, Kagoshima, Japan.
7. Division of Gastrointestinal and Pediatric Surgery, Tottori University Faculty of Medicine, Yonago, Japan.
8. Department of Gastroenterological Surgery, Hiroshima University Hospital, Hiroshima, Japan.
9. Department of Surgery, Keio University School of Medicine, Tokyo, Japan.
10. Faculty of Letters, Arts, and Sciences, Waseda University, Tokyo, Japan.
11. Department of Gastroenterological Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan.