. . . . . . . . . . . . "[We analyzed the surface gene (S gene) of a hepatitis B virus (HBV) isolate with mutations of envelope protein that rendered it undetectable by both a monoclonal hepatitis B surface antigen (HBsAg) enzyme-linked immunosorbent assay (ELISA) and polyclonal HBsAg radioimmunoassay (RIA).]. 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 . "2016-05-13T12:44:05+02:00"^^ . . . . . . . . . . . "v4.0.0.0" . "v4.0.0" .