1. Department of Pediatrics, Aichi Medical University School of Medicine
2. Department of General Medicine and Community Health Science, Hyogo College of Medicine
3. Department of Public Health, Aichi Medical University, School of Medicine
4. Department of Cancer Preventive Medicine, Graduate School of Medicine, Hokkaido University
5. Division of Endoscopy, Hokkaido University Hospital
6. Department of Infectious Diseases, Kyorin University School of Medicine