1. Department of Surgery, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital
2. Course of Advanced Clinical Research of Cancer, Juntendo University Graduate School of Medicine
3. Department of Gastroenterology, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital
4. Division of Radiation Oncology and Particle Therapy, National Cancer Center Hospital East
5. Department of Colorectal Surgery, National Cancer Center Hospital East