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Mark Litzow is a professor of medicine at the Mayo Clinic. He served as the head of the Acute Leukemia and Myeloid Neoplasm Group at Mayo Clinic's campus in Rochester, Minnesota, for 12 years and the director of the Blood and Marrow Transplant (BMT) Program at Mayo Clinic for 17 years; he remains an active member of both programs. Mark is the chair of the Leukemia Committee of Eastern Cooperative Oncology Group and the American College of Radiology Imaging Network (ECOG-ACRIN) since 2013. He is also currently the co-chair of the Acute Leukemia Working Committee for the Center for International Blood and Marrow Transplant Research (CIBMTR).