"Neurological Disorders". Johns Hopkins Department of Neurology. 24 February 2020. Archived from the original on 15 September 2021. பார்க்கப்பட்ட நாள் September 15, 2021.
"Neurological Disorders". Johns Hopkins Department of Neurology. 24 February 2020. Archived from the original on 15 September 2021. பார்க்கப்பட்ட நாள் September 15, 2021.