title: PHONOCARDIOGRAPHIC STUDIES ON PATENCY OF DUCTUS ARTERIOSUS.
mesh_terms: D004373:Ductus Arteriosus; D004374:Ductus Arteriosus, Patent; D006801:Humans; D006973:Hypertension; D006976:Hypertension, Pulmonary; D010701:Phonocardiography
keywords: DUCTUS ARTERIOSUS, PATENT; HYPERTENSION, PULMONARY; PHONOCARDIOGRAPHY