1. Medical Oncology Unit, Policlinico Paolo Giaccone, University of Palermo, Italy
2. Medical Oncology Unit, Casa di Cura Villa Salus, Messina, Italy
3. Medical Oncology Unit, Hospital Buccheri La Ferla, Palermo, Italy
4. Surgical Oncology Unit, Policlinico Paolo Giaccone, Palermo, Italy
5. Medical Oncology Unit, Policlinico, Catania, Italy
6. GSTU Foundation for the Study of Tumors, Palermo, Italy
7. Department Promise, University of Palermo, Palermo, Italy
8. Medical Oncology Unit, La Maddalena Clinic for Cancer, Palermo, Italy