1 Department of General Internal Medicine and Psychosomatics/ University Hospital Heidelberg, Heidelberg, Germany.
2 Institute and Outpatient Clinic for Psychosomatic Medicine and Psychotherapy, University Hospital Hamburg-Eppendorf, Hamburg, Germany.
3 Department of Psychosomatic Medicine and Psychotherapy/University Hospital Tübingen, Tübingen, Germany.
4 Department of Psychosomatic Medicine and Psychotherapy/Technical University of Munich, Munich, Germany.
5 Centrum für Innere Medizin und Dermatologie, Medizinische Klinik mit Schwerpunkt Psychosomatik/ Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
6 Quantitative Health Sciences, Outcomes Measurement Science/University of Massachusetts Medical School, Worcester, Massachusetts, USA.
7 Department of General Internal Medicine and Psychosomatics/ University Hospital Heidelberg, Heidelberg, Germany, [email protected].