Funding for this research was provided by:
National Health Research Council Ministry of Health Sri Lanka
Text and Data Mining valid from 2018-04-17
Received: 25 July 2017
Accepted: 10 April 2018
First Online: 17 April 2018
Ethics approval and consent to participate
: Ethics approval was obtained from the Ethics Review Committee of Faculty of Medicine, University of Colombo (Reference Number: EC/08/119). Written informed consent was obtained from all study participants.
: The authors declare that they have no competing interests.
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