1. Department of GastroenterologyGunma Saiseikai Maebashi Hospital
2. Department of Gastroenterology and HepatologyGunma University Graduate School of Medicine
3. Department of GastroenterologyNational Hospital Organization Shibukawa Medical Center
4. Department of Internal MedicineKiryu Kosei General Hospital
5. Department of Internal MedicineIsesaki Municipal Hospital
6. Department of GastroenterologyMaebashi Red Cross Hospital
7. Department of GastroenterologyNational Hospital Organization Takasaki General Medical Center
8. Department of Hepatobiliary and Pancreatic SurgeryGunma University Graduate School of Medicine