1. Comprehensive Pneumology Center, Ludwig Maximilian University, University Hospital Grosshadern, and Helmholtz Center Munich, member of the German Center of Lung Research, Munich, Germany
2. Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, and
3. Center for Thoracic Surgery, Asklepios Biobank for Lung Diseases, Asklepios Clinic Munich–Gauting, Munich, Germany
4. Institute of Pathology, Research Unit Analytical Pathology, Helmholtz Center Munich, Munich, Germany
5. Department of Internal Medicine, Universities of Giessen and Marburg Lung Center, Justus Liebig University of Giessen, member of the German Center for Lung Research, Giessen, Germany
6. Agaplesion Lung Clinic Waldhof Elgershausen, Greifenstein, Germany
7. European IPF Network and European IPF Registry, Giessen, Germany; and
8. Department of Neurology, University of Colorado Denver, Aurora, Colorado
9. Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of California San Francisco, San Francisco, California