Second natural history study of congenital heart defects. Ventricular septal defect: echocardiography.
Pieroni DR, Nishimura RA, Bierman FZ, Colan SD, Kaufman S, Sanders SP, Seward JB, Tajik AJ, Wiggins JW, Zahka KG. Second natural history study of congenital heart defects. Ventricular septal defect: echocardiography. Circulation. 1993 Feb; 87(2 Suppl):I80-8.