1. Neurovascular Imaging Laboratory, Ingham Institute for Applied Medical Research, Clinical Sciences Stream, Sydney, Australia; South Western Sydney Clinical School, University of New South Wales (UNSW), Sydney, Australia
2. Department of Headache and Neuro-ophthalmology, Teresa Eye and Migraine Centre, Cherthala, Kerala, India
3. Department of Neurology, Apollo Hospitals, Nellore, India
4. Department of Neurology, BLK Super Speciality Hospital, New Delhi, India
5. Neurovascular Imaging Laboratory, Ingham Institute for Applied Medical Research, Clinical Sciences Stream; South Western Sydney Clinical School, University of New South Wales (UNSW); Department of Neurology and Neurophysiology, Liverpool Hospital and South Western Sydney Local Health District (SWSLHD); NSW Brain Clot Bank, NSW Health Statewide Biobank and NSW Health Pathology; Stroke and Neurology Research Group, Ingham Institute for Applied Medical Research, Sydney, Australia