1. Cochrane Haematology, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf; Faculty of Medicine and University Hospital Cologne, University of Cologne; Cologne Germany
2. Cochrane Netherlands; Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University; Utrecht Netherlands
3. Centre for Statistics in Medicine; University of Oxford; Oxford UK
4. Haematology/Transfusion Medicine; NHS Blood and Transplant; Oxford UK
5. Nuffield Department of Primary Care Health Sciences; University of Oxford; Oxford UK
6. Kleijnen Systematic Reviews Ltd; York UK
7. Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht, Utrecht University; Utrecht Netherlands
8. Department of Health Research Methods, Evidence, and Impact; McMaster University; Hamilton Canada
9. Center of Integrated Oncology Cologne-Bonn, Department I of Internal Medicine; University of Cologne, Faculty of Medicine and University Hospital Cologne; Cologne Germany
10. Cochrane Cancer, Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf; Faculty of Medicine and University Hospital Cologne, University of Cologne; Cologne Germany