1. Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
2. Department of Immunology, Interfaculty Institute for Cell Biology, University of Tübingen, Tübingen, Germany
3. Department of Anaesthesia, Critical Care and Pain Medicine, Division of General Anaesthesia and Intensive Care Medicine, Medical University of Vienna, Vienna, Austria
4. Department of Blood Group Serology and Transfusion Medicine, Medical University of Vienna, Vienna, Austria