Received: 1 July 2019
Accepted: 30 August 2019
First Online: 30 October 2019
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the Faculty of Medicine at Mansoura University in Egypt. All patients included in this research were under age of 18 years old, so written informed consent to publish the data contained within this study were given by their parents or legal guardians.
: Not applicable
: The authors declare that they have no competing interests.