1 Dept of Medicine, Division of Respirology, University of Calgary, Calgary, AB, Canada.
2 Royal Brompton Hospital, London, UK.
3 Université Paris-Saclay, Faculty of Medicine, Le Kremlin-Bicêtre, France.
4 Assistance Publique - Hôpitaux de Paris (AP-HP), Dept of Respiratory and Intensive Care Medicine, Pulmonary Hypertension National Referral Center, Hôpital Bicêtre, Le Kremlin-Bicêtre, France.
5 INSERM UMR_S 999, Hôpital Marie Lannelongue, Le Plessis-Robinson, France.
6 Dept of Medicine, Division of Respirology, University of Calgary, Calgary, AB, Canada jcweathe@ucalgary.ca.
7 Libin Cardiovascular Institute of Alberta, Calgary, AB, Canada.