1. Clinical Division of Social Psychiatry, Department of Psychiatry and Psychotherapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
2. Department of Epidemiology, Center for Public Health, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria
3. Department of Health Sciences, St. Pölten University of Applied Sciences, Fachhochschule St. Pölten GmbH Matthias Corvinus - Straße 15, 3100 St. Pölten, Austria