Entrainment of rhythmic melatonin secretion in man to a 12-hour phase shift in the light/dark cycle.
D000328:Adult; D002940:Circadian Rhythm; D006801:Humans; D008027:Light; D008297:Male; D008550:Melatonin / Q000378:metabolism* / Q000652:urine; D013997:Time Factors
D008550:Melatonin