GSTM1 and Beta-thalassemia: The CZE method successfully quantified common Hb fractions and therefore detected Hb SS, S trait, SC, beta-thalassemia, decreased A2, delta chain variants, and elevated Hb F. It also captured the presence of uncommon hemoglobin variants, including Hemoglobin E trait, G-Philadelphia, and Hemoglobin Q-India, to be further tested for identification of the variant.