title: Delayed recovery of sleep and melatonin rhythms after nightshift work in Antarctic winter.
mesh_terms: D000864:Antarctic Regions; D002940:Circadian Rhythm; D006801:Humans; D008297:Male; D008550:Melatonin / Q000031:analogs & derivatives* / Q000097:blood; D012621:Seasons; D012893:Sleep Wake Disorders / Q000503:physiopathology*; D013997:Time Factors; D014940:Work Schedule Tolerance
chemical_list: D008550:Melatonin; C012365:6-hydroxymelatonin