Text and Data Mining valid from 2019-08-15
Received: 26 June 2019
Accepted: 22 July 2019
First Online: 15 August 2019
Ethics approval and consent to participate
: The study has been carried out following the approval of the Ethics Committee of the Faculty of Medicine, Alexandria University, in accordance with Helsinki Declaration (reference serial number: 0101952). Informed written consent to participate in the study was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.