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Animal
Female
Male
Rats
8
Testosterone
8
estradiol
rat
8
testosterone
Castration
6
Estradiol
6
Luteinizing Hormone
6
Prolactin
6
animal experiment
6
endocrine system
6
luteinizing hormone
6
prolactin
6
radioisotope
6
Comparative Study
4
Rats, Inbred Strains
4
Serotonin
4
Support, Non-U.S. Gov't
4
castration
4
central nervous system
4
drug efficacy
4
female genital system
4
follitropin
4
male genital system
4
nonhuman
4
sex difference
4
Aging
2
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1
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2
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3
-
4
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5
-
6
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7
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8