1. Department of Surgical, Oncological & Stomatological Disciplines, University of Palermo, 90100 - Palermo, Italy
2. Medical Oncology Unit, ARNAS Garibaldi, Catania, Italy
3. Thoracic Oncology Unit, Medical Oncology Department, Istituto Nazionale dei Tumori, Milano, Italy
4. Division of Medical Oncology, Department of Onco-Hematology, IRCCS-CROB, Referral Cancer Center of Basilicata, 85028 Rionero, Vulture (PZ), Italy.