Funding for this research was provided by:
Fogarty International Center (2D43-TW007-292)
Received: 30 January 2020
Accepted: 26 April 2020
First Online: 14 May 2020
Ethics approval and consent to participate
: This study was approved by the ethics review committee of the Aga Khan University, and permissions were obtained from participating institutions.
: Not applicable.
: The authors declare that they have no competing interests.