1. Department of Thoracic Medicine and Surgery Lewis Katz School of Medicine at Temple University Hospital Philadelphia Pennsylvania USA
2. Department of Medicine University of Cincinnati Medical Center Cincinnati Ohio USA
3. The Advanced Lung Disease and Transplant Program Inova Fairfax Hospital Falls Church Virginia USA
4. Interstitial Lung Disease/Sarcoidosis unit Royal Brompton Hospital, National Heart and Lung Institute, Imperial College London London UK
5. Division of Pulmonary Medicine, College of Medicine King Saud University Riyadh Saudi Arabia
6. Department of Pulmonary Medicine, and Department of Inflammation and Immunity Cleveland Clinic Cleveland Ohio USA
7. The University of Alabama at Birmingham School of Medicine Birmingham Alabama USA
8. Pulmonary and Critical Care, Mayo Clinic Rochester Minnesota USA
9. Department of Cardiology Sint Antonius Hospital Nieuwegein Netherlands
10. University of Utah School of Medicine Salt Lake City Utah USA
11. Department of Respiratory Medicine Centre of Excellence for Interstitial Lung Diseases and Sarcoidosis, Erasmus Medical Centre Rotterdam The Netherlands
12. Pulmonary, Critical Care and Sleep Medicine Keck School of Medicine of the University of Southern California Los Angeles California USA
13. Centre for Human & Applied Physiological Sciences School of Basic & Medical Biosciences, Faculty of Life Sciences & Medicine, King's College London London UK
14. National pulmonary hypertension service Royal Brompton Hospital London UK
15. Royal Brompton Hospital London UK