At the age of 16 years, her anemia continued, with values as follows: Hb, 8.8 g/dL; MCV, 92 fL; MCH, 31.8 pg; WBC count, 3200/cumm (lymphocytes 48%, neutrophils 41%); and platelet count, 32.4 × 104. The gene discussed is GSTM1; the disease is anemia (phenotype).