Received: 11 May 2020
Accepted: 29 July 2020
First Online: 4 September 2020
Ethics approval and consent to participate
: All procedures performed in our study were in accordance with the ethical standards of the Ethical Committee of Medical Research Institute, Alexandria University (IORG#: IORG008812), and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed written consent to participate in the study was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.