1. German Primate Center, Clinical Neurobiology Laboratory, Kellnerweg 4, 37077 Göttingen, Germany.
2. DFG Research Center for the Molecular Physiology of the Brain, Göttingen, Germany
3. University of Göttingen, Department of Neurology, Medical School, Göttingen, Germany
4. University of Pécs, Department of Psychiatry, Medical School, Pécs, Hungary