El Amrousy, Doaa http://orcid.org/0000-0001-7836-1170
El Ashry, Heba
Maher, Sara
Ganna, Salwa
Hasan, Samir
Article History
Received: 20 November 2020
Revised: 6 January 2021
Accepted: 11 January 2021
First Online: 21 January 2021
Compliance with ethical standards
:
: Local ethics committee of Faculty of Medicine, Tanta University, approved the study. The study is in accordance with the ethical standards of institutional research committee and with the 1964 Helsinki declaration and its later amendments.
: An informed consent was obtained from the parents of all subjects of the study before enrollment.
: All the authors transfer, assign, or otherwise convey all copyright ownership, including any and all rights exclusively to the journal, in the event that such work is published by the journal.
: The authors declare that they have no conflict of interest.
: Not applicable.