About the Authors

Joshua G. X. Wong

Joshua_Gx_Wong@ttsh.com.sg

Affiliation Institute of Infectious Disease and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore

Victor C. Gan

Affiliation Institute of Infectious Disease and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore

Ee-Ling Ng

Affiliation Institute of Infectious Disease and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore

Yee-Sin Leo

Affiliations Institute of Infectious Disease and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore, Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore, Lee Kong Chian School of Medicine, Nanyang Technologicial University, Singapore, Singapore, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore

Siew-Pang Chan

Affiliations Institute of Infectious Disease and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore, Stata Users Group, Singapore, Singapore, Department of Mathematics and Science, La Trobe University, Melbourne, Victoria, Australia

Robin Choo

Affiliations Stata Users Group, Singapore, Singapore, Singapore Institute for Clinical Sciences, Brenner Centre for Molecular Medicine, Singapore, Singapore

David C. Lye

Affiliations Institute of Infectious Disease and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore

Competing Interests

Y.S.L. received educational grant from Sanofi Pasteur. The authors have read the journal’s policy and have the following conflicts. The authors confirm that Competing Interest does not alter our adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: YSL DCL. Analyzed the data: SPC RC. Wrote the paper: JGW VCG ELN YSL SPC DCB.