Received: 12 August 2020
Accepted: 12 June 2021
First Online: 22 July 2021
: Approved Department Council of Kasr Al Ainy Hospital Cairo University with no available ethical number as it does not need a number, because it is not a clinical trial. Date of ethics committee approval is 12th of January 2017. Informed written consent from parents/guardians of patients under 16 years old was obtained.
: Written informed consent for the publication of this manuscript and images was obtained from the participants’ parents or legal guardians in the case of children under 16.
: Dr Mohamed El Ghoneimy is a co-author of this study and editorial board member of the journal. He declares a competing interest for this submission. He has not handled this manuscript. The rest of the authors have no conflict of interest to declare.