1. Division of Rheumatology, University Medicine Cluster, National University Health System, Singapore, Singapore
2. Yong Loo Lin School of Medicine, National University of Singapore, Singapore
3. Saw Swee Hock School of Public Health, National University of Singapore, Singapore
4. Department of Rheumatology and Immunology, Singapore General Hospital, Singapore, Singapore
5. Department of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore, Singapore
6. Duke-National University of Singapore, Graduate Medical School, Singapore, Singapore