Circadian rhythmicity and fatigue in flight operations.
D000337:Aerospace Medicine; D002940:Circadian Rhythm; D003071:Cognition; D005221:Fatigue / Q000209:etiology*; D006801:Humans; D009784:Occupational Diseases / Q000209:etiology*; D011597:Psychomotor Performance; D012106:Research; D012890:Sleep; D013026:Space Flight