1. Institute of Social and Preventive Medicine (ISPM); University of Bern; Bern Switzerland
2. Department of Clinical Research, Clinical Trials Unit; University of Bern; Bern Switzerland
3. Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht; Utrecht The Netherlands
4. Cochrane Netherlands, Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht; Utrecht The Netherlands
5. Amgen Ltd; Cambridge UK