1. From Departments of Neurological Surgery (A.S.D., W.C., S.J.M., N.F.K.) and Radiology (A.S.D.), University of Virginia School of Medicine, Charlottesville, Va; Columbia University (S.M.), New York, NY; University Hospitals of Geneva (D.R.), Geneva, Switzerland; University of Frankfurt (S.W.), Frankfurt, Germany; Ospedale Civile Maggiore di Verona (A.P.), Verona, Italy; Division of Neurosurgery (R.L.M.), St. Michael’s Hospital, Keenan Research Centre in the Li Ka Shing Knowledge Institute of St....