Sleep and breathing. 'To sleep, perchance to breathe' (with apologies to the bard).
D000293:Adolescent; D000328:Adult; D000402:Airway Obstruction / Q000503:physiopathology; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D012119:Respiration; D012890:Sleep / Q000502:physiology*; D012891:Sleep Apnea Syndromes / Q000503:physiopathology / Q000628:therapy*