1. Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan
2. Research Unit for Preventive and Clinical Medicine, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan
3. Department of Rheumatology, Nagasaki Kita Hospital , Nagasaki, Japan
4. Nagasaki Medical Hospital of Rheumatology , Nagasaki, Japan
5. Department of Rheumatology, National Hospital Organization Nagasaki Medical Center , Omura, Japan
6. Department of Rheumatology, Sasebo Chuo Hospital , Sasebo, Japan