1. Research Group for Evidence-Based Public Health; Leibniz Institute for Prevention Research and Epidemiology; Bremen Germany
2. Department for Health Services Research, Institute for Public Health and Nursing Research, Health Sciences Bremen; University of Bremen; Bremen Germany
3. Public Health; University of Otago; Wellington New Zealand
4. Institute for Public Health and Nursing Research, Health Sciences Bremen; University of Bremen; Bremen Germany
5. Usher Institute of Population Health Sciences and Informatics; University of Edinburgh; Edinburgh UK
6. Cochrane Austria, Department for Evidence-based Medicine and Evaluation; Danube University Krems; Krems Austria
7. RTI International; Research Triangle Park North Carolina USA
8. Department of Health Promotion; AOK Baden-Württemberg; Stuttgart Germany
9. Department of General Practice and Health Services Research; University Hospital, University of Heidelberg; Heidelberg Germany
10. MRC/CSO Social and Public Health Sciences Unit; University of Glasgow; Glasgow UK