title: The frequent occurrence of alpha thalassemia in blacks.
mesh_terms: D000349:Africa; D001208:Asia; D044383:Black People; D004247:DNA / Q000032:analysis* / Q000235:genetics / Q000302:isolation & purification; D004262:DNA Restriction Enzymes / Q000378:metabolism; D006447:Hemoglobin H / Q000235:genetics*; D006455:Hemoglobins, Abnormal / Q000235:genetics*; D006801:Humans; D013789:Thalassemia / Q000453:epidemiology* / Q000235:genetics
chemical_list: D006455:Hemoglobins, Abnormal; D004247:DNA; D006447:Hemoglobin H; D004262:DNA Restriction Enzymes