About the Authors

Vernon J. Lee

vernonljm@hotmail.com

Affiliations Department of Clinical Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore, Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore

Angela Chow

Affiliation Department of Clinical Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore

Xiaohui Zheng

Affiliation Department of Statistics and Applied Probability, National University of Singapore, Singapore, Singapore

Luis R. Carrasco

Affiliations Department of Statistics and Applied Probability, National University of Singapore, Singapore, Singapore, Department of Biological Sciences, National University of Singapore, Singapore, Singapore

Alex R. Cook

Affiliations Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore, Department of Statistics and Applied Probability, National University of Singapore, Singapore, Singapore, Program in Health Services and Systems Research, Duke-NUS Graduate Medical School, Singapore, Singapore

David C. Lye

Affiliation Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore, Singapore

Lee-Ching Ng

Affiliation Environmental Health Institute, National Environment Agency, Singapore, Singapore

Yee-Sin Leo

Affiliation Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore, Singapore

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.