1. Respiratory Department, Hospital Ramón y Cajal and Medicine Department; Universidad de Alcalá (IRYCIS); Madrid Spain
2. CIBER de Enfermedades Respiratorias (CIBERES); Barcelona Spain
3. Respiratory Institute, Hospital Clinic, IDIBAPS; Universitat de Barcelona; Barcelona Spain
4. Department of Internal Medicine, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona; Universidad Católica de Murcia; Murcia Spain
5. Respiratory Department, Instituto de Biomedicina de Sevilla (IBiS), Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES); Hospital Universitario Virgen del Rocio; Seville Spain
6. Department of Thrombosis and Hemostasis; Leiden University Medical Center; Leiden the Netherlands
7. Respiratory Department; Hospital de Araba; Vitoria Spain
8. Respiratory Department; Hospital Universitario Doce de Octubre; Madrid Spain
9. Respiratory Department; Hospital Universitario Cruces; Bilbao Spain
10. Respiratory Department; Hospital Universitario A Coruña; A Coruña Spain
11. Emergency Department; Hospital Universitario Clínico San Carlos; Madrid Spain
12. Respiratory Department; Hospital Galdakao; Bilbao Spain
13. Thrombosis Research Group; Université de Saint-Etienne, Jean Monnet, Inserm, CIE3. Service de Médecine Interne et Thérapeutique, Hôpital Nord, CHU de Saint-Etienne; Saint-Etienne France
14. Department of Internal Medicine and Chest Diseases, (G.E.T.B.O.), CIC INSERM; University Hospital of Brest, European University of Occidental Brittany; Brest France
15. Divisions of Pulmonary and Critical Care Medicine and General Medical Sciences; Washington University School of Medicine; St. Louis Missouri