1. Oncology and Hemato-oncology Department, University of Milan, Milan, Italy
2. Department of Medical Oncology, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Istituto Nazionale dei Tumori, Milan, Italy
3. Clinical Epidemiology and Trial Organization, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
4. Unit of Medical Oncology 1, Department of Clinical and Experimental Oncology, Istituto Oncologico Veneto, IRCCS, Padua, Italy
5. Unit of Medical Oncology, Azienda Ospedaliero-Universitaria (AOU) Pisana, Department of Translational Research and New Technologies in Medicine, University of Pisa, Pisa, Italy
6. Medical Oncology and Hematology Unit, Humanitas Cancer Center, Humanitas Clinical and Research Center, Rozzano, Italy
7. Niguarda Cancer Center, Grande Ospedale Metropolitano Niguarda, Milan, Italy
8. Department of Oncology, AOU San Luigi di Orbassano, University of Torino, Orbassano, Italy
9. Colorectal Cancer Unit, Medical Oncology Division 1, AOU Città della Salute e della Scienza, Torino, Italy
10. Medical Oncology Unit, Ente Ospedaliero Ospedali Galliera, Genoa, Italy
11. Medical Oncology Unit A.O. Papardo and Department of Human Pathology, University of Messina, Messina, Italy
12. Department of Internal Medicine, University of Genoa and IRCCS AOU San Martino-IST, Genoa, Italy
13. Medical Oncology Unit, Fondazione Poliambulanza, Brescia, Italy
14. Medical Oncology Unit, Azienda Socio-Sanitaria Territoriale (ASST) Ospedale di Cremona, Cremona, Italy
15. Medical Oncology Unit, Azienda Socio Sanitaria Territoriale Lariana, Como, Italy
16. Medical Oncology Unit, Oncology Department, ASST Bergamo Ovest, Treviglio, Italy
17. Medical Oncology Unit, Azienda Ospedaliera San Gerardo, Monza, Italy
18. Medical Oncology Unit, Ospedale Antonio Perrino, Brindisi, Italy