. . . . . . . . . . . . "[Factors operating on gene frequency include protection of AS individuals against falciparum malaria, a high frequency of genetic factors capable of moderating the severity of sickle cell anaemia (alpha-thalassaemia and Xmn I polymorphism in G gamma gene), a high frequency of consanguineous marriage, and reproductive compensation by couples at risk for sickle cell anaemia.]. Sentence from MEDLINE/PubMed, a database of the U.S. National Library of Medicine."@en . . . . . "2016-02-19"^^ . . "Gene-disease associations inferred from text-mining the literature."@en . "DisGeNET evidence - LITERATURE"@en . "2016-05-13T12:52:01+02:00"^^ . . . . . . . . . . . "v4.0.0.0" . "v4.0.0" .