GSTM1 and anemia (phenotype): She was investigated and found to have anemia (hemoglobin (Hb) 9.9 g%), normal total leucocyte count ((TLC) 6200/mm3), differential leucocyte count ((DLC) neutrophils 50%, lymphocytes 46%) and platelet count ((Plt), 261000/mm3), elevated erythrocyte sedimentation rate ((ESR), 36 mm/hour), and positive rheumatoid factor (RF) in serum by ELISA (26.11 IU, reference 0–15 IU).