Fontes V F, Esteves C A, Sousa J E, Silva M V, Bembom M C
Department of Pediatric and Cardiac Catheterization Laboratory, Instituto Dante Pazzanese de Cardiologia, Sao Paulo, Brazil.
Am J Cardiol. 1988 Nov 1;62(13):977-9. doi: 10.1016/0002-9149(88)90908-3.