1. Department of Surgery, Ohashi Hospital, Toho University Medical Center, Tokyo, Japan.
2. Department of Surgery, Teine Keijinkai Hospital, Hokkaido, Japan.
3. Department of Surgery, NTT Medical Center, Tokyo, Japan.
4. Department of Surgery, Toyonaka Municipal Hospital, Osaka, Japan.
5. Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Tu, Japan.
6. Department of Digestive Surgery and Surgical Oncology, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan.
7. Division of Surgical Oncology, Department of Surgery, Faculty of Medicine, Tottori University, Tottori, Japan.
8. Department of Cardiovascular Surgery, National Cardiovascular Center, Osaka, Japan.
9. Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.
10. Department of Thoracic and Cardiovascular Surgery, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.
11. Department of Cardiac Surgery, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
12. Department of Cardiovascular Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
13. Division of Thoracic and Cardiovascular Surgery, Department of Surgery, Kawasaki Medical School, Kurashiki, Japan.
14. Third Department of Surgery, Ohashi Hospital, Toho University Medical Center, Tokyo, Japan.