Received: 12 February 2020
Accepted: 22 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: Ethical approval for this study was received from the ethical review committee of the Faculty of Medicine, General Sir John Kotelawala Defence University with registration No. RP/2018/10. Written informed consent was obtained from all the participants in the study.
: Not applicable.
: The authors declare that they have no competing interests.