We think that myelomonocytic skewing as demonstrated by in vitro cultures may be a more robust parameter of skewed differentiation toward the myelomonocytic over erythroid commitment because the WBC count and Hb values are more easily confounded by other condition such as infection and bleeding, which usually do not change the progenitor cell compartment.29, 30. The gene discussed is GSTM1; the disease is infection.