[1] Univ Barcelona, Hosp Univ Mutua Terrassa, Dept Pulmonol, Barcelona, Spain
[2] Univ Barcelona, Sch Med, Dept Med, Barcelona, Spain
[3] Network Ctr Biomed Res Resp Dis CIBERES, Lung Canc Grp, Barcelona, Spain
[4] Univ Barcelona, Hosp Univ Mutua Terrassa, Dept Thorac Surg, Barcelona, Spain
[5] Autonomous Univ Barcelona, Dept Morphol Sci, Unit Human Anat & Embryol, Sch Med, Barcelona, Spain