Department of Cardiology, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Laval University, Quebec City, Quebec, Canada

Correspondence to Mario Sénéchal, MD, Associate Professor, Faculty of Medicine, Laval University, Institut universitaire de cardiologie et de pneumologie de Québec, 2725 Chemin Sainte-Foy, Quebec, QC G1V 4G5, Canada. Tel: +418 656 8711; fax: +418 656 8157; e-mail: [email protected]