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Animal
Male
Melatonin
2
Norepinephrine
2
Pineal Gland
2
Rats
Support, Non-U.S. Gov't
2
animal experiment
melatonin
2
nonhuman
2
noradrenalin
2
pineal body
2
radioisotope
rat
2
5 hydroxyindoleacetic acid
1
Comparative Study
1
Endogenous opioids
1
Guinea Pigs
1
Hydroxyindoleacetic Acid
1
Naloxone
1
Organ Culture
1
Phentolamine
1
Pineal gland
1
Pituitary Hormones, Anterior
1
Propranolol
1
Rats, Inbred Strains
1
Receptors, Estradiol
1
Serotonin
1
Sex Hormones
1
animal cell
1
-
1
-
2