title: [A preliminary study of the normal circadian secretion pattern of endogenous opioids in the human].
authors.forename: E H
authors.initials: EH
authors.lastname: de Wet
authors.forename: H C
authors.initials: HC
authors.lastname: Barnard
authors.forename: H G
authors.initials: HG
authors.lastname: Luus
authors.forename: J M
authors.initials: JM
authors.lastname: Oosthuizen
mesh_terms: D000328:Adult; D002940:Circadian Rhythm; D004723:Endorphins / Q000378:metabolism*; D006801:Humans; D012016:Reference Values
chemical_list: D004723:Endorphins