Received: 22 May 2020
Accepted: 28 July 2020
First Online: 25 August 2020
Ethics approval and consent to participate
: Ethics approval was obtained from Institutional ethics Committee, Faculty of Medicine, University of Peradeniya, Sri Lanka.Informed, written consent was obtained from the parent/ guardian of the child for data collection and to use them for scientific publication.
: As identifiable data is not included this is not applicable.
: The authors declare that they have no competing interests.