Received: 19 February 2019
Accepted: 28 August 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: Was obtained from Institutional Review Committee (IRC), B. P. Koirala Institute of Health Sciences, Dharan, Sunsari, Nepal.Code no IRC/1120/017.Consent to participate: written informed consent was obtained from each patient.
: Not applicable.
: We declare that we have no competing interests.