1. Department of Psychiatry University Medical Center Groningen Groningen The Netherlands
2. Department of Neurology, University Medical Center Groningen University of Groningen Groningen The Netherlands
3. Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen University of Groningen Groningen The Netherlands
4. Department of Pharmaceutical Analysis, Groningen Research Institute of Pharmacy University of Groningen Groningen The Netherlands