1. University Hospital Department of Internal Medicine VI: Psychosomatic Medicine and PsychotherapyTuebingen Germany
2. Faculty of Psychology and Sports Science Department of Psychology University of BielefeldTuebingen Germany
3. Faculty of Science Department of Psychology, Clinical Psychology and Psychotherapy University of TuebingenTuebingen Germany
4. Robert Koch-Institute Department of Epidemiology and Health ReportingBerlin Germany