1 Faculty of Architecture and Social Sciences, Leipzig University of Applied Sciences, Leipzig, Germany; Institute of Medical Psychology and Medical Sociology, University of Leipzig, Leipzig, Germany. Electronic address: igel@sug.htwk-leipzig.de.
2 Faculty of Human and Health Sciences, University of Bremen, Bremen, Germany.
3 Faculty of Architecture and Social Sciences, Leipzig University of Applied Sciences, Leipzig, Germany; Institute of Medical Psychology and Medical Sociology, University of Leipzig, Leipzig, Germany.
4 Institute of Medical Psychology and Medical Sociology, University of Leipzig, Leipzig, Germany; Clinic and Polyclinic for Psychosomatic Medicine and Psychotherapy, Mainz, Germany.
5 Leipzig University of Applied Sciences, Leipzig, Germany.