Received: 22 September 2020
Accepted: 30 November 2020
First Online: 9 December 2020
Ethics approval and consent to participate
: Ethics approval and consent to participate were taken from our institute ethical committee (Faculty of Medicine, Ain Shams University), and being a retrospective study, the informed written consents were waived.
: Not applicable.
: The authors declare that they have no competing interests.