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Brain Research|September 18, 1998
Genetic differences in morphine sensitivity, tolerance and withdrawal in ratsO Hoffmann, A Plesan, Z Wiesenfeld-Hallin
Neuroreport|December 20, 1994
The CCK-B receptor antagonist Cl 988 reverses tolerance to morphine in ratsO Hoffmann, Z Wiesenfeld-Hallin
Anesthesia and Analgesia|April 16, 1998
Comparison of ketamine and dextromethorphan in potentiating the antinociceptive effect of morphine in ratsA Plesan, U Hedman, X J Xu, et al.
Acta Physiologica Scandinavica|November 1, 1996
N-methyl-D-aspartate receptor antagonists potentiate morphine's antinociceptive effect in the ratS Grass, O Hoffmann, X J Xu, et al.
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