Stevens, Craig W (2015) Bioinformatics and evolution of vertebrate nociceptin and opioid receptors. Vitam Horm 97:57-94
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Stevens, Craig W (2009) The evolution of vertebrate opioid receptors. Front Biosci (Landmark Ed) 14:1247-69
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Stevens, C W; Sangha, S; Ogg, B G (1995) Analgesia produced by immobilization stress and an enkephalinase inhibitor in amphibians. Pharmacol Biochem Behav 51:675-80
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Stevens, C W; Klopp, A J; Facello, J A (1994) Analgesic potency of mu and kappa opioids after systemic administration in amphibians. J Pharmacol Exp Ther 269:1086-93
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Stevens, C W (1994) Perspectives on opioid tolerance from basic research: behavioural studies after spinal administration in rodents. Cancer Surv 21:25-47
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Brenner, G M; Klopp, A J; Deason, L L et al. (1994) Analgesic potency of alpha adrenergic agents after systemic administration in amphibians. J Pharmacol Exp Ther 270:540-5
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Stevens, C W; Kirkendall, K (1993) Time course and magnitude of tolerance to the analgesic effects of systemic morphine in amphibians. Life Sci 52:PL111-6
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