Funding for this research was provided by:
Bill and Melinda Gates Foundation (OPP1084307)
Received: 6 February 2019
Accepted: 8 December 2019
First Online: 23 December 2019
Ethics approval and consent to participate
: This study was approved by Health Ministry Steering Committee of the Indian Council of Medical Research, New Delhi (India), the Institutional Ethics Committee, King George’s Medical University Lucknow, India (Reference No. 3692/Ethics.R.Cell-15 dated 02/March/2015), and relevant public authorities of state government. A voluntarily written informed consent was obtained from participants.
: Not applicable.
: The authors declare that they have no competing interests.