Center-level data
As mentioned, all patients undergoing OHT at centers performing fewer than 10 OHTs during the study period were excluded, and the corresponding centers were also excluded from the analysis. Transplant centers were stratified into three equal terciles based on OHT donor acceptance rates. Donor acceptance rates were calculated by taking the number of donor hearts accepted and dividing by the total number of offers. Donors were included in the analysis only if at least one solid organ was used for transplantation.