1. Servicio de Neumologia Hospital Universitario Vall d'Hebron Barcelona Spain
2. CIBER Enfermedades Respiratorias (CibeRes) Barcelona Spain
3. Departament de Medicina Universitat Autònoma de Barcelona Barcelona Spain
4. Department of Public Health and Primary Care Centre for Environment and Health KU Leuven Leuven Belgium
5. Department of Cell Biology Physiology and Immunology Universitat Autònoma de Barcelona Barcelona Spain