Received: 28 May 2021
Accepted: 17 November 2021
First Online: 4 January 2022
: An informed written consent was taken from each patient. All data obtained from every patient were confidential and were not used outside the study. The patients have rights to withdraw from the study at any time without giving any reason. All the costs of the investigations were afforded by the researcher. Our study was approved by ethical committee of the Department of Neurology, Faculty of Medicine, Cairo University, on 8/7/2020 (code MS-92-2020).
: Not applicable.
: The authors declare that they have no competing interests.