1. From the Department of Diagnostic and Interventional Neuroradiology (M.E., J.F.) and Institute of Medical Biometry and Epidemiology (A.A.), University Medical Center Hamburg-Eppendorf, Germany; Departments of Radiology (A.M.M.B., O.A.B., H.A.M., C.B.L.M.M.), Biomedical Engineering and Physics (A.M.M.B., H.A.M.), and Neurology (Y.B.R.), Academic Medical Center, Amsterdam, the Netherlands; Department of Robotics and Mechatronics, University of Twente, Enschede, the Netherlands (A.M.M.B.); Division of...