1. From the Department of Neurosurgery, KUH NeuroCenter, Kuopio University Hospital, Kuopio, Finland (A.E.L., T.K., J.B., M.v.u.z.F., K.H., J.E.J., J.F.); Department of Neurosurgery, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland (T.K., M.v.u.z.F., J.E.J., J.F.); and Kuopio Intracranial Aneurysm Database (A.E.L., T.K., M.v.u.z.F., K.H., J.E.J.) and Hemorrhagic Brain Pathology Research Group (A.E.L., J.B., J.F.), KUH NeuroCenter, Kuopio University Hospital, Kuopio, Finland.