1. Department of Pulmonology; Hospital Germans Trias i Pujol; Badalona (Barcelona) Spain
2. Department of Medicine; Facultat de Medicina; Universitat Autònoma de Barcelona; Bellaterra (Barcelona) Spain
3. Department of Pulmonology; Hospital Mútua de Terrassa; Terrassa (Barcelona) Spain
4. Department of Pathology; Hospital Germans Trias i Pujol; Badalona (Barcelona) Spain
5. Catalan Institute of Oncology; Badalona (Barcelona) Spain