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] Case-control association analysis of polymorphisms in the delta-opioid receptor, OPRD1, with cocaine and opioid addicted populations
[PMID 18518925] Genetic susceptibility to heroin addiction: a candidate gene association study.
[PMID 23427138] A commonly carried genetic variant in the delta opioid receptor gene, OPRD1, is associated with smaller regional brain volumes: Replication in elderly and young populations
[PMID 23612435] An intronic variant in OPRD1 predicts treatment outcome for opioid dependence in African-Americans