Moreover, patients classified as MF showed elevated peripheral blasts ≥ 1% (13.8%; n = 64), leukocytosis (42.4%; n = 197) or anemia (36.2%, n = 168; 14%, n = 65 with severe anemia Hb < 10 g/dl). The gene discussed is GSTM1; the disease is anemia (phenotype).