ROBERT R. JENQ, M.D., is director of the City of Hope Microbiome Program and a Professor in the Department of Hematology and Hematopoietic Cell Transplantation. He is a physician-scientist who manages the care of adults undergoing hematopoietic cell transplantation and directs a research laboratory. His research efforts have focused on effects of the bacterial microbiome on outcomes in cancer patients, including hematopoietic cell transplantation, checkpoint blockade immunotherapy, and CAR-T cell therapy.