1. Institute of Social and Preventive Medicine (ISPM) University of Bern Bern Switzerland
2. F. Hoffmann‐La Roche AG Basel Switzerland
3. Department of Hygiene and Epidemiology University of Ioannina School of Medicine Ioannina Greece
4. Julius Center for Health Sciences and Primary Care University Medical Center Utrecht Utrecht The Netherlands
5. Cochrane Netherlands, Julius Center for Health Sciences and Primary Care University Medical Center Utrecht Utrecht The Netherlands
6. Department of Clinical Research Clinical Trials Unit, Institute of Social and Preventive Medicine, University of Bern Bern Switzerland