Bachs, Liliana Codeine and clinical impairment in samples in which morphine is not detected. [electronic resource] - European journal of clinical pharmacology Apr 2003 - 785-9 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0031-6970 Standard No.: 10.1007/s00228-003-0561-y doi Subjects--Topical Terms: AdultAlcoholic Intoxication--epidemiologyAnalgesics, Opioid--bloodAutomobile DrivingCentral Nervous System--drug effectsCodeine--bloodDose-Response Relationship, DrugFemaleHumansMaleMorphine--bloodNorway--epidemiologyStatistics as TopicSubstance Abuse Detection--methods