About the Authors
Infectious Disease Epidemiology Unit, London School of Hygiene & Tropical Medicine, London, United Kingdom
Department of Pediatrics and Child Health, Aga Khan University, Karachi, Pakistan
The authors have declared that no competing interests exist.
ICMJE criteria for authorship read and met: KE AZ. Agree with the manuscript's results and conclusions: KE AZ. Designed the experiments/the study: KE AZ. Analyzed the data: KE AZ. Collected data/did experiments for the study: KE AZ. Wrote the first draft of the paper: KE. Contributed to the writing of the paper: KE AZ.