1. From the Department of Neurosurgery (M.J., M.S., M.U.S., J.M.), University of Leipzig, Leipzig, Germany; the Department of Neurosurgery (M.J.), Liverpool Hospital, University of New South Wales, Australia; the Department of Anaesthesiology and Intensive Care Medicine (M.S.), Rheinische-Friedrich-Wilhelms University, Bonn, Germany; and the Department of Neurosurgery (M.U.S.), Eberhard Karls University, Tübingen, Germany.