Received: 5 December 2019
Accepted: 14 May 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: Ethical clearance was obtained from the Ethical Review Committee of the Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka (P/94/02/2019). Permission to conduct the study was obtained for the administration of the Sri Lanka Army. Written consent was obtained from the participants who were informed that participation for this study was voluntarily and thus refusal would not result in any untoward effects.
: Written consent to publish the data was obtained from participants.
: The authors have declared that they have no competing interests.