1. Division of RA and Autoimmune Diseases, Internal Medicine, Nagahama City Hospital, Shiga, Japan;
2. The Third Department of Internal Medicine, Division of Gastroenterology and Hepatology, Kansai Medical University, Osaka, Japan;
3. Division of Rheumatology, Internal Medicine, Kudo General Hospital, Ishikawa, Japan;
4. Division of Rheumatology, Department of Internal Medicine, Graduate School of Medical Science, Kanazawa University, Ishikawa, Japan;
5. Department of Clinical Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan;
6. Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan