Received: 1 September 2019
Accepted: 6 May 2020
First Online: 12 May 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Review Committee, Faculty of Medicine, University of Kelaniya (Reference No. P/204/12/2016). Written consent was obtained from all the participants before the interview.
: Not applicable.
: The authors declare that they have no competing interests.