GSTM1 and anemia (phenotype): Based on the study findings and those of others, it is evident that utilising HemoCue® as a screening tool for anaemia in children may yield inaccurate results and could significantly impact decision-making and patient care e.g., based on the data a child with a Coulter Counter-measured Hb concentration of 8.0 g/dL could have a HemoCue®-measured Hb concentration between 4.32 and 11.39 g/dL.