Received: 28 September 2020
Accepted: 22 November 2020
First Online: 30 November 2020
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the Faculty of Medicine at Ain shams University in Egypt (FWA 000017585); Reference Number of approval: R67/2020. The requirement for written consent was waived in this retrospective study.
: Not applicable.
: The authors declare that they have no competing interests.