1. Department of Immunology and Rheumatology, Division of Advanced Preventive Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan
2. Department of Gastroenterology and Hepatology, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan
3. Department of Pathology, Nagasaki University Hospital , Nagasaki, Japan