HBA2 and thalassemia: Among them, 113 cases had -α3.7/αα, 25 cases had -α4.2/αα, 16 cases had αwsα/αα, 3 cases had --SEA/αα, and 1 case had αcsα/αα which was identified as thalassemia due to the appearance of the cs band during the detection of HbA2 by capillary electrophoresis.