Funding for this research was provided by:
Bill and Melinda Gates Foundation (2015-R1-A1-A3A0–4001267)
Received: 10 June 2019
Accepted: 28 April 2020
First Online: 7 May 2020
Ethics approval and consent to participate
: This study was approved by Aga Khan University, Ethics Review Committee (ERC number: 5174-WCH-ERC-17) and National Bioethics Committee (NBC) Pakistan (NBC Number: 224). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.