URD existence for HRD HCT recipients treated at the 10 highest volume US Centers. (A) Percent of 8/8-match existence for HRD HCT recipients treated at the highest-volume HRD centers, highlighting a potential center preference/prioritization of HRD donors. The portion shown in green represents the percent of patients who received HRD HCT at that center who had an existing 8/8-matched URD, whereas the portion in red represents the patients who did not have an existing 8/8-matched URD. The dotted line illustrates the observation that 6 of 10 centers had existing 8/8-matched URDs for at least 25% of these patients. (B) Percent of 7/8–matched existence for recipients of HRD HCT treated at the highest-volume HRD centers, highlighting a potential center preference/prioritization of HRD donors. The portion shown in green represents the percent of patients who received an HRD HCT at that center who had an existing 7/8-matched URD, whereas the portion in red represents the patients who did not have an existing 7/8-matched URD. The dotted line illustrates the observation that 8t of 10 centers had existing 7/8-matched URDs for at least 80% of these patients.