Analgesia in guinea pigs: a measure of tolerance development.
D000698:Analgesia; D000704:Analysis of Variance; D000818:Animals; D001923:Brain Chemistry; D002247:Carbon Isotopes; D004361:Drug Tolerance; D006168:Guinea Pigs; D006358:Hot Temperature; D008722:Methods; D009020:Morphine / Q000032:analysis / Q000494:pharmacology*; D010146:Pain
D002247:Carbon Isotopes; D009020:Morphine