In this study, the homozygous genotype for β0β0 (CD41/42 - CD41/42 and CD71/72 - CD71/72) accounted for 8.6%, the genotype was heterozygous for 2 β0β0 mutations (CD41/42 - CD17).; CD17 - CD71/72; CD17 - IVS I-1 and CD17 - CD95) accounted for 6.9%.