[1] Univ Navarra Clin, Dept Pulm, Pamplona 31200, Spain
[2] Univ Navarra Clin, Dept Radiol, Pamplona, Spain
[3] Ctr Appl Med Res CIMA, Program Solid Tumors & Biomarkers, Pamplona, Spain
[4] Brigham & Womens Hosp, Harvard Med Sch, Dept Pulm, 75 Francis St, Boston, MA 02115 USA