title: Report from the Joint Study on the Natural History of Congenital Heart Defects. I. General introduction.
mesh_terms: D001024:Aortic Valve Stenosis; D006330:Heart Defects, Congenital / Q000175:diagnosis / Q000601:surgery; D006345:Heart Septal Defects, Ventricular; D006801:Humans; D011379:Prognosis; D011446:Prospective Studies; D011666:Pulmonary Valve Stenosis