1. Department of Endocrinology, Singapore General Hospital, Singapore
2. NUS-GIS Centre for Molecular Epidemiology, National University of Singapore, Singapore
3. Department of Medicine, Alexandra Hospital, Singapore
4. Epidemiology and Disease Control Division, Ministry of Health, Singapore
5. Clinical Trials and Epidemiology Unit, National Medical Research Council, Singapore
6. Department of Community, Occupational and Family Medicine, National University of Singapore, Singapore