Funding for this research was provided by:
Bill and Melinda Gates Foundation (OPP1114237)
Received: 11 March 2019
Accepted: 3 July 2019
First Online: 10 July 2019
Ethics approval and consent to participate
: This study was approved by the institutional review boards at the Johns Hopkins Bloomberg School of Public Health (Baltimore, United States) and the INCLEN Trust International (New Delhi, India). For all children, written informed consent was obtained from the primary caregiver before enrollment in the study.
: Not applicable.
: AS received an institutional research grant from Pfizer Inc. to conduct other related work. All other authors declare that they have no competing interests.