1. Department of Comprehensive Cancer Treatment and Research at Aizu, Fukushima Medical University, Fukushima, Japan
2. Department of Surgery, Cancer Treatment Center, Aizu Chuo Hospital, Fukushima, Japan
3. Department of Gastrointestinal Tract Surgery, Fukushima Medical University, Fukushima, Japan
4. Aizu Oncology Consortium, Fukushima, Japan
5. Department of Surgery, Nippon Medical School, Tokyo, Japan
6. Department of Surgery, Bange Kousei General Hospital, Fukushima, Japan
7. Department of Obstetrics and Gynecology, Fukushima Medical University, Fukushima, Japan
8. Department of Breast Surgery, Fukushima Medical University, Fukushima, Japan
9. Department of Chest Surgery, Fukushima Medical University, Fukushima, Japan
10. Department of Radiation Oncology, Fukushima Medical University, Fukushima, Japan
11. Department of Colorectoanal Surgery, Aizu Medical Center, Fukushima Medical University, Fukushima, Japan
12. Fukushima Medical University, Fukushima, Japan