1. Institute of Occupational, Social and Environmental Medicine, Centre for Health and Society, Faculty of Medicine, University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
2. Department of Clinical Psychology, Psychotherapy and Experimental Psychopathology, Institute of Psychology, University of Mainz, Mainz, Germany
3. Faculty of Psychology, University of Hagen, Hagen, Germany
4. Faculty of Health Care, Hochschule Niederrhein, University of Applied Sciences, Krefeld, Germany