Received: 5 October 2018
Accepted: 21 August 2019
First Online: 5 September 2019
Ethics approval and consent to participate
: A written informed consent was obtained from each participant in this study or from one of his family members, and the study was approved by local ethical committee in Faculty of medicine, Beni-Suef University (the number is FWA00015574, and the date is 9th of October 2018).
: Not applicable
: The authors declare that they have no competing interests