Intracranial carotid artery calcification as an imaging marker in plain computed tomography for intracranial atherosclerotic disease in ischemic stroke patients: A retrospective observational cohort study. - Ho PH; Li R; Cheng SW; Chu CY; Lau CY; Li CK; Kwok DC; Chow CY; Auyeung M; Cheung CM (Clinical neurology and neurosurgery, 2026)