1 Department of Pulmonology, Hospital Universitari Mútua Terrassa, Terrassa, Spain; School of Medicine, University of Barcelona, Terrassa, Spain. Electronic address: jsanzsantos@mutuaterrassa.cat.
2 Department of Pulmonology, Hospital Universitari Mútua Terrassa, Terrassa, Spain.
3 Department of Thoracic Surgery, Hospital Universitari Mútua Terrassa, Terrassa, Spain; Lung Cancer Group, Network of Centers for Biomedical Research (CIBERES), Terrassa, Spain.