1. Department of Medicine Division of Gastroenterology Jichi Medical University Tochigi Japan
2. Department of Pediatrics Mongolian National University of Medical Sciences Ulaanbaatar Mongolia
3. Department of Medical Informatics Center for Information Jichi Medical University Tochigi Japan
4. Endoscopy Center, Mongolian Japan Hospital Mongolian National University of Medical Sciences Mongolia Ulaanbaatar
5. Department of Surgery Jichi Medical University Tochigi Japan