1. Institute of Transfusion Medicine, University Hospital of Schleswig‐Holstein Lübeck Germany
2. Medizinische Klinik D, University Hospital Münster Münster Germany
3. Department of Nephrology University Hospital Regensburg Regensburg Germany
4. Medizinische Klinik m. S. Nephrologie, Charité Universitätsmedizin Berlin, Campus Mitte Berlin Germany
5. Clinic for Renal and Hypertensive Disorders, Medizinische Hochschule Hannover Hannover Germany
6. Department of Nephrology, University Hospital Frankfurt Goethe University Frankfurt, Frankfurt am Main Germany
7. Institute for Transfusion Medicine, University Hospital Essen, University Duisburg‐Essen Essen Germany
8. Division of Thoracic Surgery, Hospital of the Ludwig‐Maximilians‐University München, München, Germany and Transplantation Center, Hospital of the Ludwig‐Maximilians‐University München München Germany
9. Institute of Transfusion Medicine and Transplantation Immunology, University Hospital Münster Münster Germany
10. General‐, Visceral‐ and Transplant Surgery, University Medical Center of the Johannes Gutenberg‐University Mainz Germany
11. Institute for Transfusion Medicine, H&I Laboratory, Charité‐Universitätsmedizin Berlin Berlin Germany
12. Institute for Transfusion Medicine and Immunohaematology, German Red Cross Baden‐Württemberg‐Hessen, Frankfurt am Main Germany
13. Transplant center, University Hospital of Saarland, Homburg/Saar Germany