1. Department of Radiology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Albertoni 15, Bologna, Italia
2. Pathology Unit, S. Orsola Malpighi University Hospital, Bologna, Italy
3. General Surgery and Transplantation Unit, Department of Medical and Surgical Sciences, S. Orsola Hospital, University of Bologna, Bologna, Italy
4. Department of Medical and Surgical Sciences, S. Orsola Hospital, University of Bologna, Bologna, Italy