1 Pulmonology Department, Hospital Universitari Mútua Terrassa, University of Barcelona, Barcelona, Spain.
2 Departament de Cirurgia i Especialitats Medicoquirúrgiques, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona (UB), Barcelona, Spain.
3 Mutua Terrassa Foundation, Barcelona, Spain.
4 Thoracic Surgery Department, Hospital Universitari Mútua Terrassa, University of Barcelona, Barcelona, Spain.
5 Network of Centres for Biomedical Research on Respiratory Diseases (CIBERES), Lung Cancer Group, Barcelona, Spain.