1. Pulmonary Hypertension Research Group, Laval University, Québec City, Québec, Canada
2. Institut Universitaire de Cardiologie et de Pneumologie de Québec Research Center, Laval University, Québec City, Québec, Canada
3. Faculty of Medicine, McGill University, Montreal, Québec, Canada
4. Department of Medicine, Laval University, Québec City, Québec, Canada