1. Renal Transplant Unit; Amsterdam the Netherlands
2. Renal Transplant Unit; Department of Nephrology; Leiden University Medical Centre; Leiden the Netherlands
3. Department of Pathology; Academic Medical Centre; Amsterdam the Netherlands
4. University of Amsterdam; Amsterdam the Netherlands
5. Department of Nephrology; Groningen University Hospital; Groningen the Netherlands
6. Department of Epidemiology and Biostatistics; Academic Medical Centre; Amsterdam the Netherlands
7. Department of Surgery; Academic Medical Centre; Amsterdam the Netherlands
8. Department of Surgery; Groningen University Hospital; Groningen the Netherlands
9. Department of Pathology; Leiden University Medical Centre; Leiden the Netherlands
10. Department of Pathology; Groningen University Hospital; Groningen the Netherlands
11. Department of Surgery; Leiden University Medical Centre; Leiden the Netherlands
12. Sanquin Diagnostic Services; Amsterdam the Netherlands
13. Department of Immunogenetics and Transplantation Immunology; Leiden University Medical Centre; Leiden the Netherlands
14. Department of Clinical Pharmacy and Toxicology; Leiden University Medical Centre; Leiden the Netherlands