Incidence and risk factors of extremely poor functional outcome after burr-hole evacuation of chronic subdural hematoma in octogenarians and nonagenarians- a retrospective cohort analysis. - Zarour, Shiri; Rajmilevich, Ianiv; Zohar, Nitzan; Agur, Rotem; Bergman, Lottem; Weiss, Yotam; Goren, Or; Matot, Idit; Cohen, Barak (BMC Anesthesiology, 2025)