1. Division of Rheumatology, Department of Internal Medicine Keio University School of Medicine Tokyo Japan
2. Division of Rheumatology, Department of Internal Medicine Toho University Ohashi Medical Center Tokyo Japan
3. Department of Allergy and Clinical Immunology Chiba University Hospital Chiba Japan
4. Department of Rheumatology Dokkyo Medical University Tochigi Japan
5. Chugai Pharmaceutical Co., Ltd. Tokyo Japan
6. The First Department of Internal Medicine, School of Medicine University of Occupational and Environmental Health Kitakyushu Japan