1. Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
2. Medical Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
3. Medical Oncology, Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
4. Lowe Center for Thoracic Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
5. Medical Oncology, Ospedali Riuniti Padova Sud, AULSS6 Euganea,Padova, Italy