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The Canary Database
Yale Occupational and Environmental Medicine Program
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Browse by Outcome: Anxiety (1 article)

% of records by year: 1965 Small chart of records by year 2010

limit to year 1991

Blanchard DC, Weatherspoon A, Shepherd J, Rodgers RJ, Weiss SM, Blanchard RJ
"Paradoxical" effects of morphine on antipredator defense reactions in wild and laboratory rats.
Pharmacol Biochem Behav 1991 Dec;40(4):819-28.
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