1. Department of Oncological and Interventional Radiology, Businco Hospital, 09121 Cagliari, Italy
2. Department of Radiology, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo, 200, 00128 Roma, Italy
3. Department of Radiology, Hospital del Mar, 08003 Barcelona, Spain
4. Department of Interventional Radiology, Mater Olbia Hospital, 07026 Olbia, Italy