Thalassemia, an inherited quantitative globin disorder, consists of two types, α– and β–thalassemia. β–thalassemia is a heterogeneous disease that can be asymptomatic, mild, or even severe. Considerable research has focused on investigating its underlying etiology. These studies found DNA hypomethylation in the β–globin gene cluster significantly related to fetal hemoglobin (HbF) elevation. His...