Text and Data Mining valid from 2019-08-30
Received: 29 March 2019
Accepted: 18 July 2019
First Online: 30 August 2019
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Committee of Kathmandu University School of Medical Sciences (ref. no. 63/16). All the participants provided consent to participate in the study.
: All authors provide consent for publication.
: The authors declare that they have no competing interests.