Gagliardi M G, Bevilacqua M, Di Renzi P, Picardo S, Passariello R, Marcelletti C
Department of Pediatric Cardiology and Cardiac Surgery, Bambino Gesù Children's Hospital, Rome, Italy.
Am J Cardiol. 1991 Oct 15;68(10):1089-91. doi: 10.1016/0002-9149(91)90501-b.