1. Department Psychosomatic Medicine and Psychotherapy; Technische Universität München; Munich Germany
2. Department Internal Medicine 1; Klinikum Saarbrücken; Saarbrücken Germany
3. Department of Medical Psychology and Medical Sociology; University of Leipzig; Leipzig Germany
4. Clinic for Psychosomatic Medicine and Psychotherapy; University Medical Center Johannes Gutenberg University Mainz; Mainz Germany