title: Sleep patterns and fatigue symptoms in permanent night workers and shift workers.
mesh_terms: D000328:Adult; D005221:Fatigue / Q000503:physiopathology*; D005511:Food Handling; D006801:Humans; D008669:Metallurgy; D008875:Middle Aged; D009784:Occupational Diseases / Q000503:physiopathology*; D012890:Sleep / Q000502:physiology*; D014937:Work; D014940:Work Schedule Tolerance