Following the World Health Organization criteria (12), diagnosis of ICH was performed by using computed tomography (CT) or magnetic resonance (MR) imaging. ICH patients were eligible for the study if they met the following criteria: (1) diagnosis of spontaneous ICH; (2) age ≥18 years; and (3) presentation within 7 days from onset of symptoms. We excluded from the study any ICH case secondary to trauma.
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