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IP address: 44.201.64.238
Time: 2024-03-28T17:39:02Z
URL: http://scholar.google.com/scholar_lookup?title=Loss+of+morphine-induced+analgesia%2C+reward+effect+and+withdrawal+symptoms+in+mice+lacking+the+m-opioid-receptor+gene&year=1996&author=Matthes&journal=Nature&volume=383&issue=6603&pages=819-823&doi=10.1038%2F383819a0&pmid=8893006