1. Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, German Red Cross Blood Service Baden-Württemberg-Hessen; Mannheim Germany
2. German Red Cross Blood Service NSTOB, Institute Springe; Springe Germany
3. German Red Cross Blood Service West; Hagen Germany
4. Institute of Transfusion Medicine and Immunohematology, Baden-Baden, German Red Cross Blood Service Baden-Württemberg-Hessen; Baden-Baden Germany
5. Department of Blood Group Serology and Transfusion Medicine; Medical University Vienna; Vienna Austria
6. Institute of Transfusion Medicine and Immunohematology, German Red Cross Blood Service Baden-Württemberg-Hessen, Goethe University Hospital; Frankfurt am Main Germany.