1. From the St Michael’s Hospital Division of Neurosurgery (R.L.M.), Keenan Research Centre and the Li Ka Shing Knowledge Institute of St Michael’s Hospital and Department of Surgery, University of Toronto, Toronto, Ontario, Canada; the University of Virginia (N.F.K.), Charlottesville, Va; Columbia University (S.M.), New York, NY; University Hospitals of Geneva (D.R.), Geneva, Switzerland; the University of Mannheim (P.S.), Mannheim, Germany; the University of Frankfurt (S.W.), Frankfurt, Germany;...