1. National Centre for Infectious Diseases , Singapore , Singapore
2. Yong Loo Lin School of Medicine, National University of Singapore , Singapore , Singapore
3. Lee Kong Chian School of Medicine, Nanyang Technological University , Singapore , Singapore
4. Saw Swee Hock School of Public Health, National University of Singapore , Singapore , Singapore
5. Ministry of Health , Singapore , Singapore
6. Environmental Health Institute, National Environment Agency , Singapore , Singapore
7. Department of Infectious Diseases, Tan Tock Seng Hospital , Singapore , Singapore
8. Duke-NUS Graduate Medical School, National University of Singapore , Singapore , Singapore
9. Department of Infectious Diseases, Singapore General Hospital , Singapore , Singapore