1. University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), 35392 Giessen, Germany;
2. Excellence Cluster Cardiopulmonary Institute (CPI), 35392 Giessen, Germany;
3. Institute for Lung Health (ILH), 35392 Giessen, Germany;
4. Lung Clinic, Evangelisches Krankenhaus Mittelhessen, 35398 Giessen, Germany;
5. Department of Surgery, Justus-Liebig-University Giessen, 35392 Giessen, Germany;
6. Institut für Pathologie, Überregionale Gemeinschaftspraxis für Pathologie und Zytologie, 35578 Wetzlar, Germany;
7. Pediatric Nutritional Medicine, Else-Kröner-Fresenius-Fresenius-Ceter for Nutritional Sciences, Technical University Munich, 85354 Freising, Germany;
8. Department of Clinical Immunology and Transfusion Medicine, Justus-Liebig University Giessen, 35392 Giessen, Germany;
9. Department of Thoracic Surgery, Vienna General Hospital, 1090 Vienna, Austria;
10. Comprehensive Pneumology Center, Research Unit Lung Repair and Regeneration, Helmholtz Center Munich, Ludwig Maximilians University Munich, 81377 Munich, Germany;
11. Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15261;
12. Max-Planck-Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany; and
13. European IPF Registry/Biobank, 35392 Giessen, Germany