1. Quebec Heart and Lung Institute, Laval University, 2725 chemin Ste-Foy, Quebec City, Quebec G1V4G5, Canada
2. Columbia University Medical Center, New York-Presbyterian Hospital, 177 Fort Washington Avenue, New York, NY 10032, USA
3. Institut Clínic Cardiovascular, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Carrer de Villaroel, 170, 08036 Barcelona, Spain
4. Rigshospitalet, University of Copenhagen, Blegdamsvej 9, 2100 Copenhagen, Denmark
5. Hospital Reina Sofia of Cordoba, Avenida Menendez Pidal, 14004 Cordoba, Spain