1. The Division of Gastroenterology and Hepatology, Department of Internal Medicine, School of Medicine, Keio University
2. The Division of Rheumatology, Department of Internal Medicine, School of Medicine, Keio University
3. The Center for Diagnostic and Therapeutic Endoscopy, School of Medicine, Keio University
4. The Division of Nephrology and Endocrinology, Department of Internal Medicine, School of Medicine, Keio University
5. The Department of Surgery, School of Medicine, Keio University
6. Division of Diagnostic Pathology, School of Medicine, Keio University