1. Imperial College London (Royal Brompton Hospital); London UK
2. ResMed Science Center, ResMed; Martinsried Germany
3. Sleep and Ventilation Center Blaubeuren/Lung Center; Ulm Germany
4. Department of Medical Biometry and Epidemiology; University Medical Centre Eppendorf; Hamburg Germany
5. Comprehensive Heart Failure Center and Department of Medicine I; University Hospital and University of Würzburg; Würzburg Germany
6. University Paris Diderot, Sorbonne Paris Cité, Hôpital Bichat; Paris France
7. Department of Internal Medicine III, Heart Centre; Klinikum der Universität zu Köln; Köln Germany
8. CHU de Grenoble; Grenoble France
9. Royal Brompton Hospital; London UK
10. Mayo Medical School; Rochester MN USA
11. Hôpital Jeanne d'Arc, Dommartin les Touls; France
12. Abteilung Pneumologie, Ruhrlandklinik; Universitätsklinik Essen; Essen Germany