1. Department of Neurology (I.A.S.), St Stephen’s Hospital, Delhi, India.
2. Department of Neurology, Christian Medical College, Ludhiana, India (D.B.C.G.).
3. Department of Stroke and Neurointervention, Artemis Hospital, Delhi, India (R.K.).
4. Department of Critical Care (A.P.), St Stephen’s Hospital, Delhi, India.