1. Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School , Tokyo , Japan
2. Department of Genetic Medicine, Nippon Medical School , Tokyo , Japan
3. Department of Clinical Genetics, Tokyo Metropolitan Cancer and Infectious Diseases Center , Bunkyo-ku, Tokyo , Japan
4. Department of Pulmonary Medicine and Oncology, Nippon Medical School , Tokyo , Japan
5. Department of Diagnostic Pathology, Nippon Medical School Hospital , Tokyo , Japan
6. Diagnostics and Therapeutics of Intractable Diseases, Intractable Disease Research Center, Graduate School of Medicine, Juntendo University , Bunkyo-ku, Tokyo , Japan
7. Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University , Kawagoe , Japan