. . . . . . . . . . . . "[The Val158Met polymorphism of the COMT (Catechol-O-Methyltransferase) gene, involved in dopamine regulation and related to negative symptoms, has been previously thought to interact with cannabis use in the modulation of risk of psychosis.]. 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 . "2016-05-13T12:47:54+02:00"^^ . . . . . . . . . . . "v4.0.0.0" . "v4.0.0" .