Received: 23 September 2020
Accepted: 1 March 2021
First Online: 9 March 2021
: Written informed consent was obtained from the parents for the clinical assessment and testing on a consent form approved by the Ethics Review Committee, Faculty of Medicine, University of Colombo.
: Written informed consent was obtained from the probands’ parents for the publication of their personal and clinical details with any identifying images in this study. A copy of the written consent is available for review by the Editor of this journal.
: The authors declare that they have no competing interests.