title: Sickling rates and heterozygotic frequencies under differential fitness.
mesh_terms: D000755:Anemia, Sickle Cell / Q000097:blood / Q000235:genetics*; D006455:Hemoglobins, Abnormal; D006579:Heterozygote; D006801:Humans; D013223:Statistics as Topic
chemical_list: D006455:Hemoglobins, Abnormal