Funding for this research was provided by:
University of Colombo, Sri Lanka (AP/3/2/2015/PG/07)
University Grants Commission, Sri Lanka (UGC/DRIC/PG/2015(i)/CMB/01)
Text and Data Mining valid from 2018-02-13
Received: 7 March 2017
Accepted: 9 February 2018
First Online: 13 February 2018
Ethics approval and consent to participate
: Written, informed consent from all study participants and ethical clearance to conduct this study was obtained from the Ethics Review Committee, Faculty of Medicine, University of Colombo [EC-15-082].
: The authors declare that they have no competing interests.
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