1. General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
2. Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
3. Department of Psychotherapy and Systems Neuroscience, Justus Liebig University of Giessen, Giessen, Germany
4. Bender Institute of Neuroimaging, Justus Liebig University of Giessen, Giessen, Germany
5. Center of Mind, Brain and Behavior, Universities of Marburg and Giessen, Giessen, Germany
6. Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hannover, Germany
7. Department of Molecular Psychology, Institute of Psychology and Education, Ulm University, Ulm, Germany
8. Outpatient Clinic for Behavioral Addiction, Department of Psychosomatic Medicine and Psychotherapy, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
9. Department of Psychiatry and Psychotherapy, Research Group S:TEP (Substance Use and Related Disorders: Treatment, Epidemiology, and Prevention), University of Lübeck, Lübeck, Germany