Received: 28 August 2021
Accepted: 8 December 2021
First Online: 20 December 2021
: 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 cost of the investigations was afforded by the researcher. Our study was approved by ethical committee of the Department of Neurology, Faculty of Medicine, Cairo University on 12/7/2021.
: Not applicable.
: The authors declare that they have no competing interests.