1 Department of Neurology (RD), Apollo Specialty Hospital, Jayanagar, Bengaluru; Department of Neurology (P. Shafi) and Department of Neuro-Radiology (CN), Apollo Specialty Hospital, Jayanagar, Bengaluru; Department of Neurology (SA), National Institute of Mental Health and Neurosciences (NIMHANS), Bengaluru; and Department of Neurology (P. Satishchandra), Apollo Specialty Hospital, Jayanagar, Bengaluru, India.