HBB and thalassemia: Beyond that, we identified six rare thalassemia genotypes: HBA2 c.272_279delAGCTTCGG heterozygote, HBB c.180G>C heterozygote, HBB c.341T>A heterozygote, HBB c.68A>C heterozygote, HBB c.68A>G heterozygote, and heterozygous deletion of HBB exons 1-3.