1. Department of Occupational and Environmental Medicine, Singapore General Hospital Outram Road, Singapore, Singapore
2. Preventive Medicine Residency Program, National University Health System, Singapore, Singapore
3. Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
4. Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
5. Duke-NUS Medical School, National University of Singapore, Singapore, Singapore