1. Center for Rheumatology, Okayama Saiseikai General Hospital
2. Department of Medicine and Clinical Science, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
3. Department of pharmacovigilance, Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University
4. Department of the Control for Rheumatic Diseases, Graduate School of Medicine, Kyoto University
5. Division of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University
6. Nephrology & Rheumatology, First Department of Internal Medicine, Kyorin University School of Medicine