Upfront and Repeated Gamma-Knife Radiosurgery for Small (≤5 mL) Unruptured Brain Arteriovenous Malformation: A Cohort of 249 Consecutive Patients. - Hak, Jean-François; Borius, Pierre-Yves; Spatola, Giorgio; Chopinet, Sophie; Testud, Benoit; Girard, Nadine; Brunel, Hervé; Regis, Jean (World Neurosurgery, 2022)