9Xu XM, Zhou YQ, Luo GX et al. The prevalence and spectrum of alpha and beta thalassaemia in Guangdong Province: implications for the future health burden and population screening. J Clin Pathol, 2004, 57:517
10Higgs DR, Vickers MA, Wilkie AOM et al. A review of the molecular genetics of the human α - globin gene cluster. Blood, 1989, 73 : 1081