1. Pulmonary Hypertension Program, Division of Respiratory Medicine, Peter Lougheed Centre, University of Calgary, Calgary, Alberta, Canada;
2. Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université de Laval, Quebec, Quebec, Canada;
3. Centre for Pulmonary Vascular Disease, Sir Mortimer B Davis Jewish General Hospital, McGill University, Montreal, Quebec, Canada;
4. Canadian Thoracic Society, Ottawa, Ontario, Canada;
5. Thoracic and Cardiac Imaging Sections, The Ottawa Hospital Cardiac Radiology, University of Ottawa Heart Institute, University of Ottawa, Ottawa, Ontario, Canada;
6. Division of Thoracic Surgery, Toronto General Hospital, Toronto Pulmonary Endarterectomy Program, University of Toronto, Toronto, Ontario, Canada;
7. University of Ottawa Heart Institute Pulmonary Hypertension Clinic, Cardiology Division, University of Ottawa, Ottawa, Ontario, Canada;
8. University of Ottawa Heart Institute Pulmonary Hypertension Clinic, Respirology Division, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada;
9. Pulmonary Hypertension Program, Respirology Division, Vancouver General Hospital, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada;
10. University of Alberta Pulmonary Hypertension Clinic, University of Alberta, Edmonton, Alberta, Canada;
11. Pulmonary Vascular Medicine, University of California San Diego, California, U.S.A.;
12. Centre for Pulmonary Vascular Diseases, Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium;
13. Southwest Ontario Pulmonary Hypertension Clinic, London Health Sciences Centre, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada