CD34 and paroxysmal nocturnal hemoglobinuria: There were no differences in recipient sex/age, disease status, PNH (paroxysmal nocturnal hemoglobinuria) clone, previous treatment, time from diagnosis to allo-HSCT, donor–recipient relationship, the blood types of donors to recipients, the source of haploidentical graft, the count of MNCs, and CD34+ cells from the haploidentical grafts.