Received: 29 January 2020
Accepted: 29 May 2020
First Online: 22 June 2020
Ethics approval and consent to participate
: The study was conducted according to the ethical standards of the Helsinki Declaration. Verbal consent was obtained from the parents of the patients to perform the diagnostic genetic testing. DNA samples of control individuals were included in the study, according to the Bioethics Committee approval; reference number GH-2261/27-11-2011.
: Not applicable
: The authors declare that they have no competing interests.