1. From the Department of Academic Neurosurgery (C.H., Z.C., A.L., P.S., J.D.P., M.C.), Addenbrooke’s Hospital, Cambridge, UK; the Department of Neurology (C.H.), University Hospital Aachen, Aachen, Germany; the Institute of Anaesthesiology and Intensive Care Medicine (A.L.), University of Brescia, Italy; and the Department of Neurology (R.R.D.), Alfried-Krupp-Krankenhaus, Essen, Germany.