1. Department of Clinical Immunology and Rheumatology, Hiroshima University Hospital , Hiroshima, Japan
2. Department of Rheumatology, Hiroshima Prefectural Hospital , Hiroshima, Japan
3. Department of Infectious Diseases, Hiroshima University Hospital , Hiroshima, Japan
4. Department of Surgery, Graduate School of Biomedical and Health Science, Hiroshima University , Hiroshima, Japan
5. Department of Orthopaedic Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University , Hiroshima, Japan