Bakr, Salwa http://orcid.org/0000-0001-6345-6097
Khorshied, Mervat
Talha, Noha
Jaffer, Karim Yahia
Soliman, Nohair
Eid, Khaled
El-Ghamrawy, Mona
Article History
Received: 1 August 2018
Accepted: 15 April 2019
First Online: 27 April 2019
Compliance with ethical standards
: The study protocol was approved by the Research Ethics Committee of Faculty of Medicine, Cairo University. Informed consents were willingly given by the parents or guardians of participants prior to enrollment in the study. All procedures performed in our study were in accordance with the 1964 Helsinki declaration.
: The authors declare that they have no conflict of interest.