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Male
rat
Rats
599
nonhuman
445
animal experiment
413
article
376
male
361
Animals
328
Animal
287
priority journal
284
controlled study
278
Support, Non-U.S. Gov't
193
animal cell
188
animal tissue
178
Rats, Inbred Strains
177
Rats, Sprague-Dawley
148
Female
140
endocrine system
124
animal
122
Rats, Wistar
112
radioisotope
106
in vitro study
102
unclassified drug
97
female
96
metabolism
86
animal model
83
Animalia
66
protein expression
66
central nervous system
60
In Vitro
59
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