Robert S. Negrin, MD is a Professor of Medicine and Chief of the Division of Blood and Marrow Transplantation at Stanford University. He received his undergraduate degree from the University of California at Berkeley and MD from Harvard University. He trained in medicine and hematology at Stanford University and joined the faculty in 1990. His research work has focused on cellular immunology in particular developing a more fundamental understanding of complex biological reactions such as graft versus host and graft vs tumor reactions in animal models and in the clinic. He has authored over 225 original papers, 40 book chapters and a book. He has received a number of awards including the Doris Duke Distinguished Clinical Scientist Award and is a member of the Association of American Physicians. He was previously the President of the International Society of Cellular Therapy and the American Society of Blood and Marrow Transplantation. He served as an Associate Editor of the journal Blood and is the founding editor of Blood Advances.