1. Medical Oncology Unit, University Hospital of Parma, Parma, Italy
2. Department of Medicine and Surgery, University of Parma, Parma, Italy
3. Gruppo Oncologico Italiano di Ricerca Clinica (GOIRC), Parma, Italy
4. Facility of Epidemiology, & Biostatistic, G-STeP Generator, Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy
5. Department of Medical Oncology, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) “Dino Amadori”, Meldola, Italy
6. Medical Oncology Unit 1, 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. Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
13. Department of Medical Oncology, Fondazione Policlinico Campus Bio-Medico, Roma, 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. Department of Health Sciences, Section of Biostatistics, University of Genova, Genoa, Italy
17. Department of Oncology, Portsmouth Hospitals University NHS Trust, Cosham, Portsmouth, UK