In a cross-sectional study on 11,800 school children conducted in the UAE by Musaiger et al. in 1994–1995, the total prevalence of anemia among six year olds was 31% (Hb < 12 g/dL) with Emirati boys more likely to develop anemia than girls and expatriate children [63]. Here, GSTM1 is linked to anemia (phenotype).