Subanalgesic morphine doses augment fentanyl analgesia by interacting with delta opioid receptors in male rats
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1992 ◽
Vol 4
(1)
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pp. 69-75
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2018 ◽
Vol 15
(2)
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pp. 94-108
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2000 ◽
Vol 224
(2)
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pp. 93-101
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1986 ◽
Vol 261
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pp. 3164-3169