Article History
Received: 30 September 2020
Accepted: 21 December 2020
First Online: 7 January 2021
Change Date: 18 January 2021
Change Type: Update
Change Details: In the original publication, there was a typo in the Abstract. "There" has been replaced with "The". The article has been updated.
Ethics approval and consent to participate
: Approval of the medical ethical committee of Children’s Hospital, Ain Shams University, was taken before the study. Written informed consent was obtained from a parent or legal guardian of participants under 16 years old. The committee’s reference number is not available.
: Not applicable.
: No conflict of interest