Jason Weatherald1,2, Renata L Riha3,4, Marc Humbert5,6,7. 1. Dept of Medicine, Division of Respirology, University of Calgary, Calgary, AB, Canada Jason.Weatherald@ahs.ca. 2. Libin Cardiovascular Institute, University of Calgary, Calgary, AB, Canada. 3. Dept of Sleep Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK. 4. Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK. 5. Faculty of Medicine, Université Paris-Saclay, Le Kremlin-Bicêtre, France. 6. INSERM UMR_S 999 (Pulmonary Hypertension: Pathophysiology and Novel Therapies), Hôpital Marie Lannelongue, Le Plessis-Robinson, France. 7. Dept of Respiratory and Intensive Care Medicine, French Pulmonary Hypertension Reference Center, Hôpital Bicêtre, Assistance Publique-Hôpitaux de Paris (AP-HP), Le Kremlin-Bicêtre, France.