Cepeda, M S Tramadol for osteoarthritis. [electronic resource] - The Cochrane database of systematic reviews Jul 2006 - CD005522 p. digital Publication Type: Journal Article; Review; Systematic Review ISSN: 1469-493X Standard No.: 10.1002/14651858.CD005522.pub2 doi Subjects--Topical Terms: Acetaminophen--therapeutic useAnalgesics, Non-Narcotic--therapeutic useHumansOsteoarthritis--drug therapyRandomized Controlled Trials as TopicTramadol--therapeutic use