1. Medical Oncology Unit, University Hospital of Parma, 43126 Parma, Italy
2. Department of Oncology and Hematology, University Hospital of Modena, 41124 Modena, Italy
3. Oncology Unit, Azienda USL Bologna, 40127 Bologna, Italy
4. Division of Internal Medicine, Hepatobiliary and Immunoallergic Diseases, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 41138 Bologna, Italy