Received: 28 November 2019
Accepted: 9 March 2020
First Online: 18 March 2020
Ethics approval and consent to participate
: Ethical clearance was obtained from the Ethical Review Committee of the Faculty of Medicine, University of Jaffna. Permission to carry out this study was obtained from the Director, TH, Jaffna and informed written consent was obtained from the participants after explaining the purpose and the nature of the study.
: Not applicable as there is no individual data in any form.
: The authors declare that they have no competing interests.