1. Department of Rheumatology, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan
2. Department of Nephrology and Urology, Fukui Red Cross Hospital, Fukui, Fukui, Japan
3. Department of Molecular Hematopathology, Okayama University Graduate School of Health Sciences, Kita-ku, Okayama, Okayama, Japan