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. Transfusion Research Unit, School of Public Health and Preventive Medicine; Monash University; Melbourne Australia
3. Population Health Sciences, Bristol Medical School; University of Bristol; Bristol UK
4. Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine; University Hospital Wuerzburg; Wuerzburg Germany
5. Laboratory of Experimental Immunology, Institute of Virology; Faculty of Medicine and University Hospital Cologne, University of Cologne; Cologne Germany
6. Jon J van Rood Center for Clinical Transfusion Research; Sanquin/Leiden University Medical Center; Leiden Netherlands
7. Department of Nephrology; Technical University of Munich, School of Medicine, Klinikum rechts der Isar; Munich Germany
8. Erasmus Medical Centre; Rotterdam Netherlands
9. Systematic Review Initiative; NHS Blood and Transplant; Oxford UK
10. Haematology/Transfusion Medicine; NHS Blood and Transplant; Oxford UK
11. 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