Funding for this research was provided by:
Medical Research Council (MRC), UK
Received: 30 September 2020
Accepted: 6 January 2021
First Online: 19 January 2021
Ethics approval and consent to participate
: The study received ethical approval from the Nepal Health Research Council (ref: 810/2018), Kings College London Research Ethics Committee (ref: LRS-18/19-8358) and the World Health Organization Research Ethics Review Committee (ref: ERC.0003246). A written informed consent was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.