Mark L. Barr, MD, is Associate Professor of Cardiothoracic Surgery (with tenure) at the University of Southern California Keck School of Medicine where he is Co-Director of Cardiothoracic Transplantation and Associate Director of Cardiothoracic Surgical Research. He obtained his medical degree from Mount Sinai School of Medicine in New York and completed 10 years of postgraduate residency at New York University and Columbia University, including a 2-year NIH-sponsored research fellowship in transplantation immunobiology.
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