GSTM1 and autoimmune hemolytic anemia: AIHA (RBC 1.64, Hb 5.3, MCV 120.9, RDW 17.8, % neutrophils 89.3, % lymphocytes 5.1, % monocytes 3.8, reticulocyte count 29.8, corrected reticulocyte count: 5.3%, BUN: 13.6 mg/dL). DAT was positive