Received: 11 August 2017
Accepted: 10 September 2018
First Online: 17 September 2018
Ethics approval and consent to participate
: “Not Applicable”. The ethics committee of Nepal Health Research Council (NHRC) approved the study.
: “Not applicable”.
: The authors declare that they have no conflict of interest.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.