Received: 5 March 2020
Accepted: 11 August 2021
First Online: 17 August 2021
: The ethical approval for the study was obtained from the Institutional Review Board of the Institute of Medicine, Kathmandu, Nepal with Ref. No. 265(6-11-E)2/073/074. Written informed consent was obtained from each participant before enrollment, and where participants were children (under 16 years old) from their parent or guardian.
: Not applicable.
: The authors declare that they have no competing interests.