Received: 18 April 2019
Accepted: 25 June 2020
First Online: 23 July 2020
Ethics approval and consent to participate
: The study was approved by the Nepal Health Research Council (NHRC) and the Research Ethics Committee at the London School of Hygiene & Tropical Medicine (Reference 10345). All participants provided written informed consent for their own participation.
: Not applicable.
: The authors declare that they have no competing interests.