List of abbreviations:
AA: aplastic anemia; AL: acute leukemia; allo-HSCT: allohematopoietic stem cell transplantation; ATG: antithymocyte globulin; CML: chronic myeloid leukemia; GVHD: graft-versus-host disease; HBsAb: hepatitis B surface antibody; HBsAg: hepatitis B surface antigen; HBV: hepatitis B virus; HLA: human leukocyte antigen; MAC: myeloablative conditioning; MDS: myelodysplastic syndrome; NHL: Non-Hodgkin’s lymphoma; NMAC: nonmyeloablative conditioning; PBSCT: peripheral blood stem cell transplantation; ROC: receiver operating characteristic.