1. Department of Rheumatology; Tokyo Medical University Hospital; Tokyo Japan
2. Rheumatic Disease Center; Kurashiki Medical Center; Okayama Japan
3. Department of Orthopaedic Surgery; Faculty of Medicine; The University of Tokyo; Tokyo Japan
4. Department of Lifetime Clinical Immunology; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
5. Department of Rheumatology; Clinical Research Center for Allergy and Rheumatology; National Hospital Organization Sagamihara Hospital; Kanagawa Japan