Funding for this research was provided by:
Department for International Development, UK Government
Received: 13 June 2019
Accepted: 4 October 2019
First Online: 2 November 2020
Ethics approval and consent to participate
: Ethical approval was provided by icddr,b’s Ethical Review Committee and written informed consent was taken from all study participants.
: Written consent to publish study results, maintaining participants’ anonymity, was taken from all study participants. All authors provided their consent to publish this article.