1. Center of Research on Psychology in Somatic diseases (CoRPS) Department ofMedical & Clinical Psychology Tilburg University The Netherlands
2. Department of Internal Medicine Federal Armed Forces Central Hospital, Koblenz Germany
3. Institute of Medical Statistics and Computational Biology, Medical Faculty and University Hospital of Cologne Germany
4. Department of Psychosomatic Medicine and Psychotherapy University of Göttingen Germany
5. Klinik und Poliklinik für Psychosomatik und Psychotherapie Universitätsklinikum Köln Germany