1. Department of General, Visceral and Transplantation Surgery; Campus Virchow Klinikum; Charité-Universitätsmedizin Berlin; Berlin Germany
2. Institute for Transfusion Medicine and HLA Typing Laboratory; Campus Virchow Klinikum; Charité-Universitätsmedizin Berlin; Berlin Germany
3. Institute for Medical Immunology; Campus Virchow Klinikum; Charité-Universitätsmedizin Berlin; Berlin Germany
4. Institute for Pathology; Campus Virchow Klinikum; Charité-Universitätsmedizin Berlin; Berlin Germany