1. Department of Surgery, Division of Lower Gastrointestinal Surgery Hyogo College of Medicine Nishinomiya Hyogo Japan
2. Study Group for Familial Adenomatous Polyposis in the Japanese Society for Cancer of the Colon and Rectum Tokyo Japan
3. Department of Digestive Tract and General surgery, Saitama Medical Center Saitama Medical University Saitama Japan
4. Department of Gastrointestinal Oncology and Department of Genetic Oncology, Department of Hereditary Tumors Osaka International Cancer Institute Osaka Japan
5. Department of Gastroenterological Surgery Cancer Institute Hospital of the Japanese Foundation for Cancer Research Tokyo Japan
6. Department of Gastroenterology Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Tokyo Japan
7. Department of Surgical Oncology, Faculty of Medicine The University of Tokyo Tokyo Japan
8. Division of Molecular Diagnosis and Cancer Prevention Saitama Cancer Center Saitama Japan
9. Department of Surgery Kurume University School of Medicine Kurume Japan
10. Department of Surgery National Defense Medical College Saitama Japan
11. Department of Clinical Genetics Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Tokyo Japan
12. Cancer Treatment Center Toyonaka Municipal Hospital Osaka Japan
13. Division of Molecular and Diagnostic Pathology Niigata University Graduate School of Medical and Dental Sciences Niigata Japan