GSTM1 and anemia (phenotype): One of the key findings was that Pv Asym individuals had low values for hematocrit and hemoglobin, and these values were even lower in Pv Asym women (media Hb =11,25 g/dL; parasitemia: median=1.54 par/μL), categorizing them with mild anemia (World Health Organization, 2011), however, we cannot conclusively demonstrate this due to low sample size (n=4).