1. Department of Social and Preventive Medicine, Centre for Public Health, Medical University of Vienna, Vienna, Austria
2. Section for Outcomes Research, Centre for Medical Statistics, Informatics and Intelligent Systems, Medical University of Vienna, Vienna, Austria
3. Ludwig Boltzmann Cluster Arthritis and Rehabilitation, Vienna, Austria
4. Department of Maternal, Child and Gender Health and Nutrition, Federal Ministry of Labour, Social Affairs, Health and Consumer Protection, Vienna, Austria