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Animal
Male
Rats
Rats, Inbred Strains
rat
11
Support, Non-U.S. Gov't
9
In Vitro
8
animal experiment
8
Muscle Contraction
5
in vitro study
5
nonhuman
5
acetylsalicylic acid
4
phentolamine
4
radioisotope
4
Castration
3
Electric Stimulation
3
Myocardial Contraction
3
Norepinephrine
3
Vas Deferens
3
animal
3
animal cell
3
article
3
beta adrenergic receptor
3
calcium
3
castration
3
drug efficacy
3
heart
3
heart atrium
3
inotropism
3
male
3
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1
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2
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3JOUR
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4
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5
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6
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7
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8
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9
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10
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11