1. Martin Luther University Halle-Wittenberg; Institute for Medical Sociology; Magdeburger Str. 8 Halle (Saale) Germany 06112
2. Martin Luther University Halle-Wittenberg; Institute of Health and Nursing Sciences; Magdeburger Strasse 8 Halle (Saale) Germany 06112
3. Martin Luther University Halle-Wittenberg; Department of Psychiatry, Psychotherapy and Psychosomatics; Julius Kühn Strasse 7 Halle (Saale) Germany 06112
4. Universität Witten/ Herdecke; Herdecke Germany