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43. Discriminative stimulus effects of opioids in pigeons trained to discriminate fentanyl, bremazocine and water: evidence of pharmacological selectivity. Picker MJ, Cook CD. Behav Pharmacol; 1997 Jun; 8(2-3):160-73. PubMed ID: 9833011 [Abstract] [Full Text] [Related]
44. Premedication with butorphanol. A comparison with morphine. Laffey DA, Kay NH. Br J Anaesth; 1984 Apr; 56(4):363-7. PubMed ID: 6712850 [Abstract] [Full Text] [Related]
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