. . . . . . . "[CXCR4 usage can emerge independently, in multiple lineages, along the course of HIV infection.The mode of emergence, i.e. gradual or through fitness valleys seems to depend on both virus and patient factors.]. Sentence from MEDLINE/PubMed, a database of the U.S. National Library of Medicine."@en . . . . . "2017-02-19"^^ . . "Gene-disease associations inferred from text-mining the literature."@en . "DisGeNET evidence - LITERATURE"@en . "2017-10-17T13:17:22+02:00"^^ . . . . . . . . . . . "v5.0.0.0" . "v5.0.0" .