1. Department of Gastroenterology, Gifu Prefectural General Medical Center
2. Department of Gastroenterology and Hepatology, Gifu Municipal Hospital
3. Division of Virology, Department of Infection and Immunity, Jichi Medical University School of Medicine
4. Department of Medical Sciences, Toshiba General Hospital
5. Department of Internal Medicine, Fujita Health University Nanakuri Sanatorium