1. Department of Psychosomatic Medicine and Psychotherapy, Ruhr University Bochum, LWL-University Hospital, Bochum, Germany
2. Psychosomatic Hospital Diessen Monastery, Diessen am Ammersee, Germany
3. General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
4. Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany