1. Department of Neurosurgery; University Medical Center Groningen, University of Groningen; Groningen
2. Department of Pharmacokinetics, Toxicology and Targeting, University Centre for Pharmacy; University of Groningen; Groningen
3. Department of Anaesthesiology; University Medical Center Groningen, University of Groningen; Groningen
4. Department of Clinical Pharmacy and Pharmacology; University Medical Center Groningen, University of Groningen; Groningen
5. Department of Neurology; University Medical Center Groningen, University of Groningen; Groningen the Netherlands