Received: 23 March 2020
Accepted: 11 June 2020
First Online: 17 August 2020
Ethics approval and consent to participate
: The study involves human participants. All procedures performed in studies involving human participants were approved by Ain Shams University, Faculty of Medicine Ethics Review Board. Consents for participation in the study were taken from patients’ parents.
: Consents for publication were taken from patients’ parents.
: The authors have no competing interests to disclose.