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. Department of Surgery; Mayo Clinic; Rochester Minnesota USA
3. Department I of Internal Medicine; University Hospital of Cologne; Cologne Germany
4. Haematology/Transfusion Medicine; NHS Blood and Transplant; Oxford UK
5. 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