Regional opioids in anesthesiology and pain management.
D000701:Analgesics, Opioid; D000758:Anesthesia; D000818:Animals; D006801:Humans; D010146:Pain / Q000188:drug therapy*; D011957:Receptors, Opioid / Q000502:physiology*
D000701:Analgesics, Opioid; D011957:Receptors, Opioid