1. Department of Gastroenterology and Hepatology; Musashino Red Cross Hospital; Musashino Japan
2. Department of Psychiatry; Seiwa Hospital; Shinjuku Japan
3. Department of Psychiatry; National Center of Neurology and Psychiatry; Kodaira Japan
4. Oomiyamusashino Clinic; Saitama Japan
5. Department of Gastroenterology and Hepatology; Tokyo Medical and Dental University; Tokyo Japan
6. First Department of Internal Medicine; Faculty of Medicine; University of Yamanashi; Chuo Japan