Text and Data Mining valid from 2020-02-18
Received: 13 December 2019
Accepted: 23 December 2019
First Online: 18 February 2020
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the Faculty of Medicine at Sohag University in Egypt on 13 September 2015; Reference Number of approval F 14. Written informed consent of all patients for their participation was given by their parent or legal guardian.
: Not applicable.
: The author declares that he/she has no competing interests.