1. Saw Swee Hock School of Public Health, and
2. Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore
3. Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado, USA
4. Epidemiology and Disease Control Division, Ministry of Health, Singapore
5. Keck School of Medicine, University of Southern California, Los Angeles, California, USA
6. Division of Cancer Control and Population Sciences, University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania, USA
7. Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
8. Duke-NUS Graduate Medical School Singapore, Singapore