1. Division of Rheumatology and Immunology, 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, Department of Internal Medicine, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan;
4. First Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan