Received: 12 June 2020
Accepted: 19 June 2020
First Online: 28 September 2020
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the Faculty of Medicine—Alexandria University in Egypt on 18 October 2017; Reference Number of approval: 0105217. All parents of patients included in this study gave written informed consent to participate in this research.
: Not applicable.
: The authors declare that they have no competing interests.