- Correspondence to Dr Patrick Mathieu, Institut Universitaire de Cardiologie et de Pneumologie de Québec/Quebec Heart and Lung Institute, 2725 Chemin Ste-Foy Québec, Quebecs, Canada G1V 4G5;
- Received March 11, 2014
- Revised July 4, 2014
- Accepted July 5, 2014
- First published August 5, 2014.
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