1. Department of Cognitive Neurology; Göttingen University Medical Center; Göttingen Germany
2. Department of Medical Radiation Physics; Lund University; Lund Sweden
3. Encepharm; Göttingen Germany
4. Department of Neuroanatomy; Albert-Ludwigs-University; Freiburg Germany
5. Clinical Neurobiology Laboratory; German Primate Center; Göttingen Germany