1. Nephrology and Dialysis Unit, S. Maria della Scaletta Hospital, 40026 Imola, Italy
2. Department of Clinical Surgical, Diagnostic and Pediatric Sciences, University of Pavia, 27100 Pavia, Italy
3. Anaesthesia, Intensive Care and Pain Therapy, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy
4. Radiology Unit, S. Maria della Scaletta Hospital, 40026 Imola, Italy
5. Department of Surgical, Medical, Molecular Pathology and Critical Care Medicine, University of Pisa, 56124 Pisa, Italy
6. Azienda Ospedaliero Universitaria Pisana Via Paradisa, 2, 56126 Pisa, Italy