Domenico Galetta1, Lorenzo Spaggiari2. 1. Division of Thoracic Surgery, European Institute of Oncology, IRCCS, Milan, Italy. Electronic address: domenico.galetta@ieo.it. 2. Division of Thoracic Surgery, European Institute of Oncology, IRCCS, Milan, Italy; Department of Oncology and Hematology-Oncology-DIPO, University of Milan, Milan, Italy.