Treatment of severe pain from osteoarthritis with slow-release tramadol or dihydrocodeine in combination with NSAID's: a randomised study comparing analgesia, antinociception and gastrointestinal effects.
The treatment of severe pain from osteoarthritis with slow-release tramadol or dihydrocodeine in combination with NSAIDs : a randomised study comparing analgesics, antinociception and gastrointestinal effects