Text and Data Mining valid from 2020-01-10
Received: 24 September 2019
Accepted: 17 December 2019
First Online: 10 January 2020
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 the Declaration of Helsinki (reference number:020753). Informed written consent to participate in the study was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.