Funding for this research was provided by:
Bill and Melinda Gates Foundation (INV-008856)
Received: 6 October 2020
Accepted: 13 December 2020
First Online: 15 January 2021
Ethics approval and consent to participate
: The study was approved by Ashirwad Ethics Committee, Ashirwad Hospital and Research Center, Ulhasnagar, Maharashtra, India. Verbal informed consent was obtained from participants and parents or guardian of participating children prior to interview.
: Not applicable.
: The authors declare that they have no competing interests.