Derivation of a CT Angiography-Based Arch Atherosclerosis Grading in Cryptogenic Ischemic Stroke. - Wadhwa, Ankur; Singh, Ravinder-Jeet; Almekhlafi, Mohammed; Menon, Bijoy K; Nambiar, Poornima N; Kathuveetil, Arun; Kannath, Santhosh; Chhabra, Manik; Sylaja, PN; Demchuk, Andrew M; Bal, Simerpreet (Annals of Indian Academy of Neurology, 2025)