1. Division of Cardiac Surgery Medical University of Vienna Vienna Austria
2. Department of Immunohematology and Blood Transfusion Leiden University Medical Center Leiden The Netherlands
3. Center for Medical Statistics Informatics and Intelligent Systems Medical University of Vienna Vienna Austria
4. Department for Blood Group Serology and Transfusion Medicine Medical University of Vienna Vienna Austria
5. Laboratory of Experimental Medicine and Pediatrics University of Antwerp Antwerp Belgium