Dr Stefan Berger is a nephrologist and director of the kidney and pancreas transplant program at UMCG. He is a member of the board of the Groningen Transplant Center and chair of the Dutch Kidney Transplantation Advisory Committee. In 2009 he completed his PhD thesis with the title “Innate immune mechanisms in kidney transplantation”. He has a specific interest in the role of the complement system in kidney transplantation. He is principal investigator in the COMBAT consortium on the role of the alternative pathway of complement in renal disease and functions as a principal investigator in a number of clinical trials.