Because patients in this study were in clinical remission, there were only 10 patients with anemia (10.3%) and the hemoglobin levels were only slightly below normal (mean Hb levels in men with anemia: 12.7 g/dL, mean Hb levels in women with anemia: 10.9 g/dL). The gene discussed is GSTM1; the disease is anemia (phenotype).