1. Department of Oncology, Geneva University Hospital, Geneva, Switzerland;
2. Santa Maria della Misericordia Hospital, Azienda Ospedaliera di Perugia, Perugia, Italy;
3. Medical Oncology Department, Fondazione IRCCS, Istituto Nazionale Tumori di Milano, Milano, Italy;
4. Public Health Section, Department of Experimental Medicine, University of Perugia, Perugia, Italy;
5. Oncology Department, Attikon University Hospital, Athens, Greece;
6. Medical Oncology, Ospedale Cannizzaro, Catania, Italy;
7. U.O.C. Oncologia, Ospedale Versilia, Lido di Camaiore (LU), Italy;
8. Medical Oncology, Agios Andreas General Hospital of Patras, Patras, Greece;
9. Medical Thoracic Oncology Unit, IRCCS Istituto Tumori “Giovanni Paolo II”, Bari, Italy;
10. Medical Oncology, Hospital Universitario HM Sanchinarro, Madrid, Spain;
11. Division of Medical Oncology, Hospital General Universitario Gregorio Marañón, Madrid, Spain;
12. Second Department of Medical Oncology, Saint Savvas Anti-Cancer Hospital, Athens, Greece;
13. First Department of Medical Oncology, Metropolitan Hospital, Athens, Greece;
14. Second Department of Medical Oncology, Hygeia Hospital, Athens, Greece;
15. Second Department of Medical Oncology, Henry Dunant Hospital Center, Athens, Greece