1. Pulmonology Service, Department of Medicine, Vall d’Hebron University Hospital, Autonomous University of Barcelona, 08035 Barcelona, Spain
2. CIBER of Respiratory Diseases (CIBERES), 28029 Madrid, Spain
3. Pathological Anatomy Service, Vall d’Hebron University Hospital, Autonomous University of Barcelona, 08035 Barcelona, Spain
4. Department of Cell Biology and Physiology and Immunology, Autonomous University of Barcelona, 08193 Barcelona, Spain