Allogeneic transplantation activity in the United States from 2010 to 2017. Allogeneic transplantation activity in (A) children and (B) adults with hematologic malignancies is shown as the numbers of HSCTs per year from HLA-matched related sibling donors, unrelated donors, umbilical cord blood, and mismatched family donors (ie, mainly haploidentical donors) performed in the United States between 2010 and 2017. From the Center for International Blood and Marrow Transplant Research with permission from Dr. M. Eapen.