Text and Data Mining valid from 2020-01-17
Received: 6 June 2019
Accepted: 11 September 2019
First Online: 17 January 2020
Ethics approval and consent to participate
: This study was reviewed and approved by the Ethics Review Committee of Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka (ERC/2013/31). Informed written consent to participate was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.