One report provides only the proportion of Hb F by alkaline denaturation technique and has been classified only in some specific points of time.3 Another one provides the proportion of Hb A2 by capillary isoelectric focusing technique in only 3 age groups: 5 months or younger, 6 months to 1 year, and 1 year or older.4 However, in real life situations, the newborns may come in any specific point of time, and all fractions of Hb together are needed to help in interpreting their thalassemia phenotypes. This evidence concerns the gene GSTM1 and thalassemia.