1. Institute of Pharmacology of Natural Products and Clinical Pharmacology, Ulm University, Ulm, Germany;
2. Lehrstuhl für Biologische Chemie, Technische Universität München, Freising, Germany;
3. Institute of Transfusion Medicine, University of Ulm, Ulm, Germany;
4. Institute of Clinical Transfusion Medicine and Immunogenetics Ulm, German Red Cross Blood Transfusion Service and University Hospital of Ulm, Ulm, Germany; and
5. Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA