Funding for this research was provided by:
National Institute of Allergy and Infectious Diseases (U01AI136033, R01AI099602)
University of Colombo (AP/3/2011/CG/01)
Received: 14 July 2017
Accepted: 5 December 2017
First Online: 22 December 2017
Ethics approval and consent to participate
: Written informed consent was obtained from all individuals. Ethical approval for the study was granted by the Ethics Review Committee, Faculty of Medicine, University of Colombo (ERC-12-068).
: Not applicable.
: The authors declare that they have no competing interests. None of the authors of this paper has a financial or personnel relationship with people or organizations that could inappropriately influence or bias the content of the paper.
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