1. Institute for Transfusion Medicine and Immunohematology of Johann Wolfgang Goethe University and German Red Cross Blood Donor Service; Frankfurt am Main Germany
2. Department of Thoracic and Cardiovascular Surgery; Johann Wolfgang Goethe University Hospital Frankfurt; Frankfurt am Main Germany
3. Department of Haemostaseology and Transfusion Medicine; Kerckhoff-Klinik; Bad Nauheim Germany
4. Blood Center Zürich, Swiss Red Cross, Schlieren; Switzerland
5. Red Cross Blood Service Graubünden; Chur Switzerland
6. Cerus Corporation; Concord California