1. Department of Surgery, Hiratsuka Gastroenterological Hospital [Current institution: IMS Fujimi General Hospital]
2. Department of Pathology, Nikko Medical Center, Dokkyo Medical University
3. Department of Internal Medicine, Kawakita General Hospital
4. Department of Radiology, Juntendo University
5. Department of Radiology, Irimoto Medical
6. Department of Gastroenterological Surgery, Jichi Medical University