Keio University - Division of Rheumatology, University of Occupational and Environmental Health - First Department of Internal Medicine, Kindai University - Nara Hospital, Tokyo Women's Medical University, The University of Osaka - Graduate School of Dentistry, University of Tokyo - Department of Orthopaedic Surgery and Spinal Surgery, Daiichi Sankyo Co., Ltd., Daiichi Sankyo Co., Ltd., University of California, San Francisco (UCSF) - Department of Radiology and Leiden University - Department of Rheumatology