1 Department of Surgery, Amsterdam University Medical Center, location AMC, Amsterdam, The Netherlands.
2 Renal Transplant Unit, Department of Nephrology, Division of Internal Medicine, Amsterdam University Medical Center, location AMC, Amsterdam, The Netherlands.
3 Department of Internal Medicine, St. Elisabeth Hospital, Willemstad, Curaçao, The Dutch Antilles.
4 Department of Nephrology, Dr. Horacio E. Oduber Hospital, Oranjestad, Aruba, The Dutch Antilles.
5 Department of Immunogenetics, Sanquin Diagnostic Services, Amsterdam, The Netherlands.