Division of Hematology, Oncology, and Cell Therapy Leadership Team In This Section Division of Hematology, Oncology, and Cell Therapy Leadership Team Division Leadership Team Helen Ross, MD Division Chief, Hematology, Oncology, and Cell Therapy Mary Jo Fidler, MD Section Chief, Oncology Celalettin Ustun, MD Section Chief, Cell Transplant Melissa Larson, MD Section Chief, Hematology