Funding for this research was provided by:
Faculty of Medicine, University of Peradeniya (RG/EF/2015/04)
Text and Data Mining valid from 2018-07-28
Received: 24 October 2017
Accepted: 20 July 2018
First Online: 28 July 2018
Ethics approval and consent to participate
: Ethical clearance was obtained from the institutional ethical review committee, Faculty of Medicine, University of Peradeniya and informed written consent was obtained from study participants.
: Not applicable.
: Authors declare that they have no conflicts of interest.
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