1. Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan;
2. Department of Rheumatology and Clinical Immunology, Wakayama Medical University, Wakayama, Japan;
3. Department of Biomedical Statistics and Bioinformatics, Graduate School of Medicine, Kyoto University, Kyoto, Japan;
4. Department of the Advanced Medicine for Rheumatic Diseases, Graduate School of Medicine, Kyoto University, Kyoto, Japan;
5. Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan