1. Department of Surgery–Organ Donation and Transplantation, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
2. Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark.
3. Department of Renal Medicine, Aarhus University Hospital, Aarhus, Denmark.
4. Department of Immunohematology and Bloodtransfusion, Leiden University Medical Center, Leiden, the Netherlands.
5. Department of Internal Medicine (Nephrology), Leiden University Medical Center, Leiden, the Netherlands.
6. Oxford Transplant Centre, University of Oxford, Oxford, United Kingdom.
7. Department of Internal Medicine, Erasmus Medical Center, Rotterdam, the Netherlands.