1. Department of Rheumatology and Allergy, Xuanwu Hospital Capital Medical University Beijing China
2. Clinical Research Centre, Zhujiang Hospital Southern Medical University Guangzhou China
3. Menzies Institute for Medical Research University of Tasmania Hobart Tasmania Australia
4. Department of Orthopaedics The Fourth Affiliated Hospital of Anhui Medical University Hefei China
5. Division of Rheumatology The University of Arizona Arthritis Center, University of Arizona College of Medicine Tucson Arizona USA
6. Department of Epidemiology and Biostatistics University of California San Francisco California USA
7. Department of Rheumatology, Royal North Shore Hospital, Institute of Bone and Joint Research, Kolling Institute University of Sydney Sydney New South Wales Australia