van Veldhuisen D J, Girbes A R, van den Broek S A, de Graeff P A, van Gilst W H, Lie K I
Department of Cardiology/Thoraxcenter, University Hospital Groningen, The Netherlands.
Am J Cardiol. 1993 Apr 15;71(11):992-4. doi: 10.1016/0002-9149(93)90920-8.