Received: 15 November 2019
Accepted: 20 March 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: This study was approved by the Nepal Health Research Council Ethical Review Board (Reference no. 797). Written informed consent was obtained from each participant.
: Not applicable
: The authors declare they have no competing interests. They have no conflicts of interest with any companies/organizations whose products or services may be discussed in this article.