CD34 and paroxysmal nocturnal hemoglobinuria: As shown in Table 1, no differences were observed between the two groups in the donor type, patient age, patient sex, donor sex, presence of paroxysmal nocturnal hemoglobinuria clones, previous IST, interval from diagnosis to transplantation, donor age, anti-thymocyte globulin source, conditioning regimen, years of transplantation, and amounts of mononuclear cells and CD34+ cells infused.