1. Division of Respirology, Department of Medicine, Libin Cardiovascular Institute, University of Calgary, Calgary, Alberta, Canada
2. Southwest Ontario PH Clinic, Division of Respirology, Department of Medicine, London Health Sciences Centre, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
3. Centre for Pulmonary Vascular Disease, Division of Respirology, Department of Medicine, Jewish General Hospital, McGill University, Montreal, Quebec, Canada