. . . . . . . . . . . . "[Finally, opioid dosage requirements may be increased depending on the risk of drug addiction (e.g., DRD2 polymorphisms decreasing the functioning of the dopaminergic reward system).]. 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 . "2014-10-02T12:35:31+02:00"^^ . . . . . . . . . . . "v2.1.0.0" . "v2.1.0" .