Funding for this research was provided by:
Higher Education Commission (20-4553/NRPU/R&D/HEC714/968)
Received: 9 May 2019
Accepted: 25 May 2020
First Online: 8 June 2020
Ethics approval and consent to participate
: Ethical approval from the ethics review committee, Aga Khan University has been obtained (ERC number 2571-Med-ERC-13).
: Informed consent and assent have been taken from participants by the research staff.
: The authors declare that they have “no competing interests".