title: 'Silent' beta thalassaemia and normal HbA2 beta thalassaemia.
mesh_terms: D005787:Gene Frequency; D006580:Genetic Carrier Screening; D006441:Hemoglobin A; D006443:Hemoglobin A2; D006801:Humans; D013789:Thalassemia / Q000235:genetics*
chemical_list: D006441:Hemoglobin A; D006443:Hemoglobin A2