Funding for this research was provided by:
Second Health sector development project of Government of Sri Lanka. (Not available)
Received: 31 December 2019
Accepted: 26 August 2020
First Online: 3 September 2020
Ethics approval and consent to participate
: The protocol was approved by the Ethics Committee of the Sri Lanka Medical Association (ERC 17/014). Informed prior written consent was obtained in written format from each next of the kin of subjects on whom sample collection was done.
: The manuscript does not contain any individual person’s data in any form.
: The authors declare that they have no competing interests.