β-globin gene cluster haplotypes in a cohort of 221 children with sickle cell anemia or Sβ⁰-thalassemia and their association with clinical and hematological features.

β-globin gene cluster haplotypes in a cohort of 221 children with sickle cell anemia or Sβ⁰-thalassemia and their association with clinical and hematological features.