Received: 2 May 2019
Accepted: 7 February 2020
First Online: 17 February 2020
Ethics approval and consent to participate
: This study was approved by the ethical review board of the Nepal Health Research Council under Regd. 502/2018. The written informed consent was collected from all the participants. The participation was voluntary and confidentiality was maintained for all the participants.
: Not applicable.
: The authors declare that they have no competing interests.