Genetic heterogeneity of sickle mutations.
D000755:Anemia, Sickle Cell / Q000235:genetics*; D004843:Epistasis, Genetic; D008040:Genetic Linkage; D014644:Genetic Variation; D006801:Humans; D009154:Mutation; D012805:Sickle Cell Trait / Q000150:complications / Q000235:genetics*; D013789:Thalassemia / Q000150:complications