Article History
Received: 11 August 2021
Accepted: 28 November 2021
First Online: 13 December 2021
Declarations
:
: The study received ethical approval from Assiut University, Faculty of Medicine’s institutional review board (IRB). Parents signed an informed consent for study participation on behalf of their children. All procedures performed in this study were in accordance with the ethical standard of the institution and/or national research committee and with the 1964 Helsinki Declaration and its later amendments.
: Not applicable.
: The authors declare no competing interests.