Spinal opiates revisited.
D000698:Analgesia / Q000379:methods*; D006801:Humans; D007273:Injections, Intramuscular; D007276:Injections, Intraventricular; D007278:Injections, Spinal; D008161:Lumbosacral Region; D009020:Morphine / Q000008:administration & dosage; D009294:Narcotics / Q000008:administration & dosage*; D010166:Palliative Care; D011957:Receptors, Opioid / Q000187:drug effects; D013997:Time Factors
D009294:Narcotics; D011957:Receptors, Opioid; D009020:Morphine