GSTM1 and thalassemia: Hb Q-Thailand, linked with the 4.2 kb deletion and Hb E, show slight red cell microcytosis, the other 8 hemoglobin variants are clinically insignificant, and we firstly identify a rare case of Hb J-Broussais (Hb Tagawa-I) and a case of Belgian Gγ(Aγδβ)0–thalassemia in Chinese.