1. Department of Medical Pharmacology, Rudolf Magnus Institute for Neurosciences, Utrecht University, Utrecht
2. Department of Functional Anatomy, Rudolf Magnus Institute for Neurosciences, Utrecht University, Utrecht
3. Department of Neurosurgery, Rudolf Magnus Institute for Neurosciences, Utrecht University, Utrecht
4. National Institute of Public Health and Environmental Protection, Laboratory for Pharmacology and Toxicology, Bilthoven, The Netherlands