1. Institute of Psychopharmacology, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, 68159 Mannheim, Germany.
2. Université de Picardie Jules Verne, INSERM UMRS, 1247 Amiens, France.
3. Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
4. Institute of Radiochemistry and Experimental Molecular Imaging, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.
5. Department of Multimodal Imaging, Max Planck Institute for Neurological Research, Cologne, Germany.
6. Brain and Mind Centre, The University of Sydney, Sydney, Australia.
7. Department of Neurophysiology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.
8. Institute for Anatomy and Cell Biology, Universitätsmedizin Greifswald, Greifswald, Germany.
9. Department of Psychiatry, Stark Neuroscience Research Institute, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
10. Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.
11. Forschungszentrum Jülich GmbH, Institute of Neuroscience and Medicine, Nuclear Chemistry (INM-5), Jülich, Germany.
12. Department of Molecular Biology, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.
13. Department of Addiction Medicine, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.