GSTM1 and hemoglobinopathy: The documented clinical importance of early detection of Hb H disease and other hemoglobinopathies known in Asian populations further led to informed discussions with the hematology community, with a particular emphasis on Hb E disease, α-thalassemias, β-thalassemias, and Hb Constant Spring [17,37,38,39,40,41].