GSTM1 and anemia: Anemia (n = 4; men: Hb<12.0 g/dL, women: Hb<11.0 g/dL), hematuria (n = 6; positive urine strip test), and thrombocytopenia (n = 6; platelets <150,000 cells/mm3) were the most common hematological abnormalities.