1. Gastrointestinal Medical Oncology Division, National Cancer Center Hospital, Tokyo, Japan.
2. Department of Clinical Oncology, Aichi Cancer Center Hospital, Nagoya, Aichi, Japan.
3. Department of Surgery, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo, Japan.
4. Department of Gastroenterological Surgery, Kumamoto University, Kumamoto, Japan.
5. Cancer Center, Hokkaido University Hospital, Sapporo, Hokkaido, Japan.
6. Department of Frontier Science for Cancer and Chemotherapy, Osaka University, Osaka, Japan.
7. Cancer Center, Osaka Medical College Hospital, Osaka, Japan.
8. Aichi Medical University, Nagakute, Aichi, Japan.
9. Kitasato University Kitasato Institute Hospital, Tokyo, Japan.
10. Misawa City Hospital, Misawa, Aomori, Japan.
11. Kyoto University, Kyoto, Japan.
12. Kochi Health Sciences Center, Kochi, Japan.
13. Taiho Pharmaceutical Co. Ltd., Tokyo, Japan.
14. Tokyo Medical and Dental University, Tokyo, Japan.