Institution: | Department of Gastroenterology, Hokkaido University Graduate School of Medicine, Sapporo;;Department of Gastroenterology, Jichi Medical School, Tochigi;;Third Department of Internal Medicine, Kyorin University School of Medicine, Mitaka;;Fourth Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya;;Central Clinical Laboratories, Shinshu University Hospital, Matsumoto;;Second Department of Internal Medicine, Oita Medical University, Oita, Japan |