Dr. Halloran is a nephrologist – researcher with a focus on organ transplantation and organ diseases, at both the clinical and basic levels. His research interests include the mechanisms of organ transplant rejection and injury, and the development of treatments to improve outcomes in transplantation and primary organ diseases. He has studied T cell-mediated rejection and described antibody-mediated kidney rejection, now recognized as the leading cause of late kidney transplant loss (1;2). Dr. Halloran is an author of over 300 peer reviewed publications.