. . . . . . . . . . . . "[Candidate genes such as those for catechol-O-methyltransferase, melanocortin-1 receptor, guanosine triphosphate cyclohydrolase and mu-opioid receptor have been intensively investigated, and associations were found with sensitivity to pain as well as with analgesic requirements in states of acute and chronic pain.]. 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 . "2016-05-13T12:46:31+02:00"^^ . . . . . . . . . . . "v4.0.0.0" . "v4.0.0" .