Received: 22 December 2020
Accepted: 8 February 2021
First Online: 1 March 2021
Ethics approval and consent to participate
: This study complies with the Declaration of Helsinki (2013), and the Faculty of Medicine, Cairo University ethics committee has approved the research protocol (the reference number is not available). A written informed consent has been obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.