1. Report from the Joint Study on the Natural History of Congenital Heart Defects. I. General introduction;Nadas;Circulation,1977
2. Second natural history study of congenital heart defects. Results of treatment of patients with pulmonary valvar stenosis;Hayes;Circulation,1993
3. Second natural history study of congenital heart defects. Results of treatment of patients with aortic valvar stenosis;Keane;Circulation,1993
4. Percutaneous balloon valvuloplasty: a new method for treating congenital pulmonary-valve stenosis;Kan;N Engl J Med,1982
5. Percutaneous transluminal balloon valvuloplasty for pulmonary valve stenosis;Kan;Circulation,1984