RT Journal Article SR Electronic T1 The Relation of Medial Thickness of Small Muscular Pulmonary Arteries to Immediate Postnatal Survival in Patients with Ventricular Septal Defect or Patent Ductus Arteriosus JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 267 OP 271 DO 10.1136/thx.13.4.267 VO 13 IS 4 A1 Heath, Donald A1 Swan, H. J. C. A1 Dushane, James W. A1 Edwards, Jesse E. YR 1958 UL http://thorax.bmj.com/content/13/4/267.abstract AB