Stefan G. Tullius, MD, PhD, is the Chief of Transplant Surgery. His research career in transplantation immunology covers a period of more than 15 years. His work on chronic graft rejection has contributed greatly to an improved understanding of the pathophysiology of long-term graft failure. His more recent research interests include individualized immunosuppression and the investigation of basic mechanisms of clinically relevant aspects in organ transplantation, focusing on novel routes for the improvement of organ quality.