1. Department of Respiratory Medicine, First Faculty of Medicine of Charles University, Thomayer Hospital Prague, Prague, Czech Republic
2. Vall d’Hebron Institut de Recerca, Servei de Pneumología, Hospital Universitari Vall d’Hebron, Departament de Medicina, Universitat Autonóma de Barcelona, Centro de Investigación Biomédica en Red de Enfermedades Respiratoria, Barcelona, Catalonia, Spain
3. King’s College National Health Service Hospital Foundation Trust, Denmark Hill, London, United Kingdom
4. Mayo Clinic, Scottsdale, Arizona; and
5. Center for Interstitial Lung Diseases, University of Washington Medical Center, Seattle, Washington