- Correspondence to Dr François Maltais, Centre de Pneumologie, Institut Universitaire de cardiologie et de pneumologie de Québec, Hôpital Laval, 2725 Chemin Ste-Foy, Ste-Foy, Québec, G1V 4G5, Canada;
- Received August 15, 2010
- Accepted November 3, 2010
- First published December 8, 2010.
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