1. Department of Pulmonary Medicine, Dr. Josep Trueta University Hospital de Girona, Santa Caterina Hospital de Salt and the Girona Biomedical Research Institute (IDIBGI), 17190 Girona, Spain
2. Centro de Investigaciones Biologicas Margarita Salas (CIB-CSIC), 28040 Madrid, Spain
3. Centro de Investigación en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
4. Biomedical Research Networking Centre on Respiratory Diseases (CIBERES), 28029 Madrid, Spain