Yong Celina M, Perez Marco, Froelicher Victor
The Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA.
J Electrocardiol. 2013 Sep-Oct;46(5):408-10. doi: 10.1016/j.jelectrocard.2013.06.010. Epub 2013 Jul 16.