1. 1Department of Health Services Research, CAPHRI School for Public Health and Primary Care, Maastricht University, Maastricht, The Netherlands
2. Health and Healthcare Research Programme, RAND Europe, Cambridge, UK
3. MRC Epidemiology Unit, University of Cambridge, Cambridge, UK
4. Department of Research and Evaluation, Kaiser Permanente Center for Effectiveness and Safety Research, Pasadena, CA, USA
5. URC Eco Ile-de-France, Université Paris Est Créteil, Paris, France
6. AP-HP Recherche Clinique Santé Publique, Hôpital Henri Mondor, Créteil, France
7. Institute of General Practice, Johann Wolfgang Goethe-University, Frankfurt, Germany
8. Department for Evidence-based Medicine and Clinical Epidemiology, Danube University Krems, Krems, Austria
9. Department of Health Services Research, Institute of Public Health, University of Copenhagen, Copenhagen, Denmark
10. Institute of Preventive Medicine, Frederiksberg Hospital, Frederiksberg, Denmark
11. Faculty of Health Services Research and Policy, London School of Hygiene and Tropical Medicine, London, UK
12. Agencia de Evaluación de Tecnologías Sanitarias, Instituto de Salud Carlos III, Madrid, Spain
13. Institute of General and Family Medicine, Witten/Herdecke University, Witten, Germany
14. Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore