GSTM1 and anemia (phenotype): Individuals with compound heterozygosity of (β0)-thalassaemia Filipino ~45 kb deletion with codon 26 (GAG>AAG) HbE (βE) have significantly severe microcytic hypochromic anaemia (Hb: 53 g/dL; MCV:59.3 fl) with significant thrombocytosis (680 × 109/L) and leucocytosis (12.9 × 109/L).