1. Department of Rheumatology, University of Yamanashi Hospital
2. Third Department of Internal Medicine, University of Yamanashi, Yamanashi
3. Center for Clinical Immunology and Rheumatology, University of Yamanashi Hospital
4. Department of Orthopaedic Surgery, University of Yamanashi, Yamanashi
5. Department of Allergy and Clinical Immunology, Chiba University Hospital, Chiba, Japan