1. Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
2. Medical Oncology Department, Istituto Nazionale Tumori Regina Elena, Rome, Italy
3. Department of Clinical Epidemiology and Trial Organization, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
4. Department of Medicine, Medical Oncology, University and Hospital Trust of Verona, Verona, Italy
5. Multidisciplinary Oncology Outpatient Clinic, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
6. Medical Oncology Department, Ospedale Vito Fazzi, Lecce, Italy
7. Medical Oncology Department, National Cancer Institute, Aviano, Italy
8. Medical Oncology Department, IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
9. Department of Medical Oncology, Ospedale S. Lazzaro ASL CN2 Alba-Bra, Cuneo, Italy
10. Medical Oncology Department, University Hospital, University of Cagliari, Cagliari, Italy
11. Medical Oncology Department, Ospedale di Cremona, Cremona, Italy
12. Biomarker Unit, Department of Applied Research and Technological Development, Fondazione IRCCS Istituto Nazionale Tumori di Milano, Milan, Italy
13. Oncology and Hemato-Oncology Department, University of Milan, Milan, Italy