1. Department of Rheumatology and Immunology, Singapore General Hospital, Singapore
2. Duke-National University of Singapore Graduate Medical School, Singapore
3. Division of Rheumatology, Department of Medicine, National University Health System, Singapore
4. Department of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore
5. Department of Medicine, Khoo Teck Puat Hospital, Singapore