Funding for this research was provided by:
National Science Foundation of Sri Lanka (NSF/2015/HS/02)
Medical Research Institute Of Sri Lanka (46/2013)
Text and Data Mining valid from 2019-12-01
Received: 11 June 2019
Accepted: 26 November 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: Ethics approval was obtained from the Ethics committee of the Medical Research Institute, Colombo, Sri Lanka (ERC No 46/2013).
: Informed, signed consent was obtained from all participants.
: The authors declare that they have no competing interests.