1. Medical Oncology Unit, Medical Science Department, American SamoaST Bergamo Ovest, Treviglio (BG), Italy
2. Cancer Center ASST Papa Giovanni XXIII, Bergamo, Italy
3. Medical Oncology Unit, Fondazione Poliambulanza, Brescia, Italy
4. Medical Oncology Unit 1, Istituto Oncologico Veneto–IRCCS, Padova, Italy
5. Laboratory of Clinical Research Methodology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano, Italy
6. Medical Oncology Unit, Ospedale San Carlo, Potenza, Italy
7. Medical Oncology Unit, Fondazione Istituto Nazionale Tumori–IRCCS, Milano, Italy
8. Medical Oncology Unit, Ospedale San Raffaele–IRCCS, Milano, Italy
9. Medical Oncology Unit, Azienda Ospedaliero Universitaria Santa Maria della Misericordia, Udine, Italy
10. Medical Oncology Unit, Azienda Ospedaliera Santa Croce, Fano, Italy
11. Medical Oncology Unit Massa Carrara, Azienda Toscana Nordovest, Italy
12. Medical Oncology Unit, Azienda Ospedaliero Universitaria San Giovanni Battista, Molinette, Torino, Italy
13. Medical Oncology Unit, AUSL-IRCCS, Reggio Emilia, Italy
14. Medical Oncology, University Hospital and University of Cagliari, Cagliari, Italy
15. Medical Oncology Unit, Hospital Casa Sollievo della Sofferenza–IRCCS, San Giovanni Rotondo, Italy
16. Gastrointestinal Medical Oncology Unit and Neuroendocrine Tumors, Istituto Europeo di Oncologia–IRCCS, Milano, Italy
17. Medical Oncology Unit, Sant’Andrea Hospital, Sapienza University of Rome and IDI-IRCCS, Roma, Italy
18. Medical Oncology Unit Azienda Ospedaliera San Giovanni Calibita Fatebenefratelli Roma, Italy
19. Medical Oncology and Hematology Unit, Humanitas Cancer Center, Humanitas Clinical and Research Center-IRCCS, Rozzano (Milano), Italy
20. Medical Oncology Unit, Ospedale di Summa A. Perrino Brindisi, Italy
21. Medical Oncology Unit, IRCCS San Martino-IST, Genova, Italy