Received: 7 June 2020
Accepted: 24 November 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: The study was conducted after approval of Medical Research Institute, Alexandria University Ethical Committee, no available reference number, and according to the Helsinki Declaration. The study was explained to all participating subjects and written informed consents were taken from all of them.
: Not applicable
: The authors declare that they have no competing interests.