Affiliation: | 1.Department of Neurosurgery, University Medical Centre Groningen, University of Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands ;2.Department of Neurology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands ;3.Department of Orthopedics, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands ;4.Department of Anesthesiology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands ; |