Received: 14 April 2020
Accepted: 5 August 2020
First Online: 14 August 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. Our study was approved by the ethical committee of the Department of Neurology, Faculty of Medicine, Cairo University, in June 2016, but Cairo University does not provide an approval reference number.An informed written consent was taken from each participant involved in this study prior to the conduct of any study-related activities.All data obtained from participants were confidential and were not used outside the study. The patients had the rights to withdraw from the study at any time without giving any reason.
: Not applicable
: None of the authors has any conflict of interests.