Columbia subject headings:
Endorphins--Physiological effect.
Endorphins--Receptors.
Narcotic antagonists.
Neurochemistry.
Harvard subject headings:
Endorphins--Physiological effect.
Endorphins--Receptors.
Narcotic antagonists.
Neurochemistry
Princeton subject headings:
Endorphins--Physiological effect.
Endorphins--Receptors.
Narcotic antagonists.
Neurochemistry.