Disorders of excessive sleepiness.
D006970:Disorders of Excessive Somnolence / Q000175:diagnosis; D005221:Fatigue / Q000209:etiology*; D006801:Humans; D007040:Hypoventilation / Q000175:diagnosis; D009290:Narcolepsy / Q000175:diagnosis; D012891:Sleep Apnea Syndromes / Q000175:diagnosis; D012893:Sleep Wake Disorders / Q000175:diagnosis / Q000209:etiology*