Received: 27 July 2020
Accepted: 9 November 2020
First Online: 19 November 2020
Ethics approval and consent to participate
: All procedures performed in the study were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments; committee’s reference number is not applicable. Written informed consent was obtained from all participants involved in this investigation prior to the conduct of any study-related activities. The study was ethically approved by research committee and reviewed by the Neurology Department, Faculty of Medicine Cairo University Board, date of approval 11 August 2018.
: Not applicable
: The authors declare that they have no competing interests (financial and non-financial).