GSTM1 and anemia (phenotype): Anaemia prevalence among all infants was 68% (n = 228) (95% CI 62.6-72.7); mean Hb 97.3gm/dl at first diagnosis (SD 9.3, 95% CI 96.1-98.5) when the mean age at diagnosis was 7.6 months (SD 2.8 months, 95% CI 7.3-8.0).