1. Medical Oncology Unit, University Hospital of Parma, Via Gramsci 14, Parma 43126, Italy
2. Department of Medicine and Surgery, University of Parma, Parma, Italy
3. Gruppo Oncologico Italiano di Ricerca Clinica (GOIRC), Parma, Italy
4. Facility Epidemiology and Biostatistic, G-Step, Fondazione Policlinico Universitario A. Gemelli, Scientific Direction, IRCCS, Rome, Italy
5. Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Italy
6. Medical Oncology Unit, IRCCS Ospedale Policlinico San Martino, Genova, Italy
7. Medical Oncology Unit, Ospedale San Paolo, Savona, Italy
8. Department of Internal Medicine and Medical Specialties (Di.M.I.), University of Genova, Genova, Italy
9. Department of Medical Oncology, Santa Chiara Hospital, Trento, Italy
10. Division of Oncology, University Hospital ‘Maggiore della Carità’, Novara, Italy
11. Oncology Unit, Macerata Hospital, Macerata, Italy
12. Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
13. Department of Medical Oncology, Università Campus Bio-Medico di Roma, Rome, Italy
14. Department of Health Sciences, University of Florence, Florence, Italy
15. Department of Diagnostic and Public Health, Section of Pathology, University of Verona, Verona, Italy
16. Medical Oncology Unit, University Hospital of Parma, Parma, Italy
17. Department of Medicine and Surgery, University of Parma, Parma, Italy; Gruppo Oncologico Italiano di Ricerca Clinica (GOIRC), Parma, Italy