1. Department of Epidemiology & International Public Health; University of Bielefeld; Bielefeld Germany
2. Department of Health Information; Institute for Quality and Efficiency in Healthcare (IQWiG); Köln Germany
3. Department of Health Services Research; Institute for Public Health and Nursing Science; University of Bremen; Bremen Germany
4. Department of Non-Drug Interventions; Institute for Quality and Efficiency in Healthcare (IQWiG); Köln Germany