title: Twenty-four-hour changes of plasmatic beta-endorphine-like immunoreactivity in healthy humans.
mesh_terms: D000328:Adult; D002940:Circadian Rhythm; D004723:Endorphins / Q000097:blood* / Q000276:immunology; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000502:physiology; D012146:Rest; D012890:Sleep / Q000502:physiology; D013312:Stress, Physiological / Q000097:blood; D001615:beta-Endorphin
chemical_list: D004723:Endorphins; D001615:beta-Endorphin