Chronic upper airway obstruction and pulmonary hypertension in Down's syndrome.
D000402:Airway Obstruction / Q000150:complications*; D002675:Child, Preschool; D004314:Down Syndrome / Q000150:complications*; D006801:Humans; D006976:Hypertension, Pulmonary / Q000209:etiology*; D008297:Male; D011660:Pulmonary Heart Disease / Q000209:etiology