1Department. of General Practice and Health Services Research, University Hospital Heidelberg, Im Neuenheimer Feld 130.3, 69120 Heidelberg, Germany
2Department of General Internal Medicine and Psychosomatics, University Hospital Heidelberg, Im Neuenheimer Feld 410, Heidelberg, Germany
3Department of Psychosomatic Medicine and Psychotherapy, Medical Center of the Justus-Liebig-University, Friedrichstraße 33, 35392 Giessen, Germany
4Department of Psychosomatic Medicine and Psychotherapy, Medical Center of the Philipps University Marburg, Baldingerstraße, 35043 Marburg, Germany
5University Hospital Muenster, Section Psychosomatic Medicine and Psychotherapy, Albert-Schweitzer-Campus 1 (Geb. A9), 48149 Münster, Germany
6University Medicine Rostock, Clinic for Psychosomatic Medicine and Psychotherapy, Gehlsheimer Str. 20, 18147 Rostock, Germany
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