Sleepiness and shift work: field studies.
D001143:Arousal; D002940:Circadian Rhythm; D004569:Electroencephalography; D006801:Humans; D012890:Sleep / Q000502:physiology; D007319:Sleep Initiation and Maintenance Disorders / Q000209:etiology; D012894:Sleep Stages / Q000502:physiology*; D014937:Work; D014940:Work Schedule Tolerance