title: [The problem of pulmonary hypertension in persistence of the ductus arteriosus].
mesh_terms: D004373:Ductus Arteriosus / Q000150:complications*; D006973:Hypertension / Q000209:etiology*; D006976:Hypertension, Pulmonary
keywords: DUCTUS ARTERIOSUS/complications; HYPERTENSION/etiology