1. Medical Oncology Unit, General Hospital, La Spezia, Italy;
2. Dipartimento di Oncologia Clinica e Sperimentale, UOC Oncologia Medica I, Istituto Oncologico Veneto-IRCCS, Padova, Italy;
3. Centro Oncologico Fiorentino, Sesto Fiorentino, Italy;
4. Medical Oncology Unit, IRCCS-Arcispedale S. Maria Nuova, OECI Clinical Cancer Center, Reggio Emilia, Italy;
5. Medical Oncology Unit, Garibaldi-Nesima Hospital, Catania, Italy;
6. Medical Oncology Unit, S. Carlo Hospital, Potenza, Italy;
7. Niguarda Cancer Center, Grande Ospedale Metropolitano Niguarda, Milano, Italy;
8. Azienda Sanitaria Locale 1, Massa Carrara, Italy;
9. Medical Oncology Santa Chiara Hospital, Trento, Italy;
10. Instituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori, Meldola, Italy;
11. Dipartimento Oncologico AOU Maggiore della Carita' Novara, Novara, Italy;
12. Department of Medical Oncology, Legnago, Italy;
13. Humanitas Clinical and Research Center, Humanitas Cancer Center, Medical Oncology and Hematology Unit, Rozzano (MI), Italy;
14. Azienda Ospedaliero-Universitaria, Modena, Italy;
15. Ospedale S. G. Moscati, Taranto, Italy;
16. Ospedale San Giovanni Calibita, Grottaferrata, Italy;
17. Medical Oncology Unit, Regional Hospital, Rio Nero in Vulture, Italy;
18. Azienda Ospedaliero-Universitaria, Udine, Italy;
19. Clinical Trials Coordinating Center, AOU Careggi, Istituto Toscano Tumori, Florence, Italy;