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. 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
4. Jon J van Rood Center for Clinical Transfusion Research; Sanquin/Leiden University Medical Center; Leiden Netherlands
5. Department of Clinical Epidemiology; Leiden University Medical Center; Leiden Netherlands
6. Systematic Review Initiative; NHS Blood and Transplant; Oxford UK
7. Clinical, Research and Development; NHS Blood and Transplant; Oxford UK
8. Sanquin Blood Bank; Amsterdam Netherlands
9. Erasmus Medical Centre; Rotterdam Netherlands
10. Department of Transfusion Medicine; SPS Hospitals; Ludhiana (Punjab) India
11. Haematology/Transfusion Medicine; NHS Blood and Transplant; Oxford UK