prov:value
| - ocodeine, morphine, diamorphine, hydromorphone, hydrocodone, methadone, pethidine, oxycodone, levorphanol, fentanyl and alfentanil, para-aminophenol derivatives such as paracetamol, pharmaceutically acceptable salts thereof and the like; and salicylates such as aspirin.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTSExample IOsteoarthritis of the Knee Safety StudyThe following clinical study was
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