Received: 2 August 2020
Accepted: 23 November 2020
First Online: 14 January 2021
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Department of Neurosurgery, Kasr Aliny Faculty of Medicine, Cairo University, on the 3rd of January 2018 (reference number, not applicable). All participants provided informed written consent to participate in this study.
: Not applicable.
: The authors declare that they have no competing interests.