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Investigation of the potentiation of the analgesic effects of fentanyl by ketamine in humans: a double-blinded, randomised, placebo controlled, crossover study of experimental pain[ISRCTN83088383]

Adam P Tucker*, Yong I Kim, Raymond Nadeson and Colin S Goodchild

BMC Anesthesiology 2005, 5:2 doi:10.1186/1471-2253-5-2

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