1. Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117599, Singapore
2. Division of Rheumatology, Department of Medicine, National University Hospital, 1E Kent Ridge Road, Level 10, NUHS Tower Block, Singapore 119228, Singapore
3. Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
4. Department of Rheumatology and Immunology, Singapore General Hospital, Singapore 169608, Singapore
5. Duke-NUS Medical School, Singapore 169857, Singapore
6. Rheumatology Service, Department of General Medicine, Sengkang General Hospital, Singapore 544886, Singapore
7. Department of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore 308433, Singapore
8. Rheumatology and Immunology Service, Department of Paediatric Subspecialties, KK Women’s and Children’s Hospital, Singapore 229899, Singapore
9. Chronic Programme, Alexandra Hospital, Singapore 159964, Singapore
10. Division of Rheumatology, Department of General Medicine, Khoo Teck Puat Hospital, Singapore 768828, Singapore
11. Biostatistics Unit, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117599, Singapore
12. Division of Rheumatology, Department of Medicine, Changi General Hospital, Singapore 529889, Singapore