About the Authors

Vernon J. Lee, Angela Chow
Department of Clinical Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore

Vernon J. Lee, Alex R. Cook
Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore

Xiaohui Zheng, Luis R. Carrasco, Alex R. Cook
Department of Statistics and Applied Probability, National University of Singapore, Singapore, Singapore

Luis R. Carrasco
Department of Biological Sciences, National University of Singapore, Singapore, Singapore

Alex R. Cook
Program in Health Services and Systems Research, Duke-NUS Graduate Medical School, Singapore, Singapore

David C. Lye, Yee-Sin Leo
Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore, Singapore

Lee-Ching Ng
Environmental Health Institute, National Environment Agency, Singapore, Singapore

Corresponding Author

vernonljm@hotmail.com

Competing Interests

The authors read the journal's policy and have the following conflicts: VJL received unrelated research funding from GSK. Yee-Sin Leo is a consultant to Sanofi-Pasteur.

Author Contributions

Conceived and designed the experiments: VJL AC DCL YSL. Performed the experiments: VJL AC DCL. Analyzed the data: VJL AC XZ LRC ARC. Contributed reagents/materials/analysis tools: VJL AC XZ LRC ARC. Wrote the paper: VJL AC XZ LRC ARC DCL LCN YSL.