. . . . . . . . . . . . "[An increased frequency of C4A null alleles has been shown in SLE, with a minimal estimated C4A null gene frequency of 0.32 versus 0.20, but no case of partial C2 deficiency was identified.]. Sentence from MEDLINE/PubMed, a database of the U.S. National Library of Medicine."@en . . . . . "2014-02-25"^^ . . "Gene-disease associations inferred from text-mining the literature."@en . "DisGeNET evidence - LITERATURE"@en . "2014-10-02T12:33:53+02:00"^^ . . . . . . . . . . . "v2.1.0.0" . "v2.1.0" .