GSTA1 and liver disorder: In the context of HSCT in children, pre-existing liver disease, age, iron overload, and genetic variants, such as glutathione S-transferase A1 (GSTA1) promoter diplotypes, CTH genetic variant (rs1021737) [3] or GSTM1 null genotypes are few of the important known patient related risk factors for developing post HSCT SOS [3–7].