GSTM1 and beta thalassemia: The HbE variant (T2 = 1.06 ms, T1 = 106 ms), HbD variant (T2 = 1.20 ms, T1 = 96.3 ms), and the beta thalassemia variant (T2 = 1.40 ms, T1 = 172 ms) appears to have large and distorted T-peak with relatively short T1- and T2- relaxations as compared to wild-type Hb (T2 = 1.12 ms, T1 = 188 ms).