About the Authors
Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, United States of America
Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
The authors have declared that no competing interests exist.
Analyzed the data: KBA RVG SJT TPE. Wrote the paper: KBA. Designed and conducted the prospective cohort study that gave rise to the data for this study: TPE DHL ALR AN. Contributed significantly to the content of the manuscript: RLB TPE DHL SJT RVG KBA.