HBA2 and alpha thalassemia spectrum: The common α0-thalassemia mutations are --SEA (NC_000016.10:g.165397_184700) and --THAI deletion (NC_000016.10:g.149863_183312), and α+-thalassemia mutations were -α3.7 (NG_000006.1:g.34164_37967del3804), -α4.2 (NC_000016.10:g.169818_174075del), Hb Constant Spring (CS, HBA2:c.427 T > C), and Hb Paksé (PS, HBA2:c.429A > T)5.