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Authors
Elhalaby, Ismael Essam http://orcid.org/0000-0002-2669-9724
Mansour, Mohamed Awad
Tawfik, Ahmed Mohamed Ismail
Aly, Hisham Fayad
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Article History
Received: 9 December 2020
Accepted: 3 April 2021
First Online: 1 July 2021
Declarations
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: This study was approved by the Research Ethics Committee and quality assurance unit of the faculty of medicine, Tanta University, on February 2019, protocol number 32967/02/19. A written informed consent for participation at this study was obtained from parents/guardians.
: A written consent for publication of the results of this study was obtained from parents/guardians.
: The authors declare that they have no competing interests.
