1. Department of Experimental Oncology, Regina Elena National Cancer Institute, Rome, Italy
2. Human Tumors Immunobiology Unit, Dept. of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
3. Department of Pathology, Regina Elena National Cancer Institute, Rome, Italy
4. Department of Chemotherapy, Regina Elena National Cancer Institute, Rome, Italy
5. Department of Medical Sciences, University of Turin, Turin, Italy