1. Department of Clinical and Molecular Medicine, “Sapienza” University of Rome, Rome, Italy
2. Department of Medical Oncology, Sant’Andrea Hospital, Rome, Italy
3. Department of Medical Oncology, University Hospital (CHU) and University of Liège, Liège, Belgium
4. Department of Radiology, Sant’Andrea Hospital, Rome, Italy
5. Department of Gastroenterology, Sant’Andrea Hospital, Rome, Italy
6. Laboratory of Medical Physics and Expert Systems, Regina Elena National Cancer Institute, Rome, Italy
7. Department of Clinical Medicine, Sapienza University of Rome, Rome, Italy