1. Institute of Computer Science, Foundation of Research and Technology Hellas, Heraklion, Greece
2. Department of Surgical Sciences, University of Turin, Turin, Italy
3. Radiology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Italy
4. Biomedical Research Institute, Foundation of Research and Technology Hellas, University Campus of Ioannina, Ioannina, Greece