Identification of candidate genes involved in clinical variability among Tunisian patients with β-thalassemia

► β-thalassemic patients were divided into β-thalassemia major (TM) and intermedia (TI). ► STR were studied in search of a new explanation for phenotypic variability. ► Comparison has shown for one STR, one specific allele to TM patients ► Comparison has shown for two STR, two specific alleles to TI patients ► STR identified are probably linked to genes able to act on β-thalassemia expression.