Text and Data Mining valid from 2019-10-23
Received: 6 August 2019
Accepted: 15 October 2019
First Online: 23 October 2019
Ethics approval and consent to participate
: The study was approved by the Ethical Research Committee of the Faculty of Medicine, Tanta University under the code 30461/08/15.
: All participating authors consent for publication.
: The authors declare that they have no competing interests.