GSTM1 and graft versus host disease: AC: Accompanying condition; aGVHD: Acute GVHD; ALL: Acute lymphoblastic leukemia; AML: Acute myeloblastic leukemia; ANC: Absolute neutrophil count; ASCT: Allogeneic stem cell transplantation; BR: Best response; cGVHD: Chronic GVHD; CR: Complete remission; F: Female; GVHD: Graft versus host disease; Hb: Hemoglobin; M: Male; MDS: Myelodysplastic syndrome; MF: Myelofibrosis; NR: Non-responsive; P: Primary; PGF: Poor graft function; PN: Patient no; PNH: paroxysmal nocturnal hemoglobinuria; PLT: Platelet; RBC: Red blood cell; PR: Partial remission; S: Secondary