1. Department of Rheumatology and Applied Immunology Faculty of Medicine, Saitama Medical University Saitama Medical University Saitama Japan
2. Division of Rheumatology and Clinical Immunology Department of Medicine Jichi Medical University Tochigi Japan
3. Social Medicine, Saitama Medical University Saitama Japan
4. Department of Orthopaedic Surgery Saitama Medical University Saitama Japan
5. Kozu Orthopaedic Clinic Chiba Japan