Just as in our previous study with 2.5 and 5 mg mifepristone in which the subjects underwent surgery on completion of treatment (13), the percentage of women with anemia (Hb ≤ 10.0 g/L) was significantly less in the 5 mg group 45 days after treatment, and this continued to be the case until the end of the 9-month followup. The gene discussed is GSTM1; the disease is anemia (phenotype).