Spinal opiate administration for chronic pain: a major advance in therapy.
D006801:Humans; D007278:Injections, Spinal / Q000379:methods; D009294:Narcotics / Q000008:administration & dosage*; D010148:Intractable Pain / Q000188:drug therapy*; D011957:Receptors, Opioid / Q000187:drug effects
D009294:Narcotics; D011957:Receptors, Opioid