[1] European Inst Oncol, Dept Thorac Surg, Via Ripamonti 435, I-20141 Milan, Italy
[2] European Inst Oncol, Dept Epidemiol & Biostat, I-20141 Milan, Italy
[3] European Inst Oncol, Dept Radiol, I-20141 Milan, Italy
[4] European Inst Oncol, Dept Plast & Reconstruct Surg, I-20141 Milan, Italy
[5] Univ Milan, Sch Med, I-20122 Milan, Italy