1. Institute of Applied Health Research, University of Birmingham; UK
2. University of Oxford; Oxford Clinical Trials Research Unit; UK
3. University of Ottawa; Ottawa Hospital Research Institute; Canada
4. University of Bristol; Population Health Sciences, Bristol Medical School; UK
5. Utrecht University; Julius Center for Health Sciences and Primary Care and Cochrane Netherlands, UMC Utrecht; The Netherlands
6. Cochrane; Editorial & Methods Department; London UK
7. Institute for Evidence in Medicine (for Cochrane Germany Foundation), Albert-Ludwigs-University; Freiburg i.B. Germany
8. Cochrane Germany Foundation; Freiburg i.B. Germany