Received: 28 April 2020
Accepted: 4 January 2021
First Online: 12 January 2021
Ethics approval and consent to participate
: The research related to human subject use complied with all the relevant national regulations and institutional policies. Local ethical approval for the study was obtained from the Research Committee of the Faculty of Medicine at Sohag University, Egypt (Number 652, 2018). Written informed consent was obtained from all parents of the participating children.
: The authors declare that they have obtained the consent for publication from each parent’s patient.
: The authors declare that they have no competing interests.