1. Department of Surgical Sciences, Cattolica Sacro Cuore University, Rome - Italy
2. Complex Operative Unit (UOQ Nephrology and Dialysis, A. O. della Provincia, Lodi - Italy
3. Department of Vascular Surgery, Ospedali Riuniti, Ancona - Italy
4. Department of Nephrology and Dialysis, S. Giovanni Bosco Hospital, Turin - Italy
5. Department of Nephrology and Dialysis, Ospedali Riuniti, Foggia - Italy
6. Complex Operative Unit (UOC) Nephrology and Dialysis, S. Eugenio Hospital, Rome - Italy
7. Operative Unit of Nephrology and Dialysis, San Carlo Borromeo Hospital, Milan - Italy
8. Operative Unit of Nephrology and Dialysis, S. Anna Hospital, Como - Italy
9. Complex Operative Unit (UOC), S. Camillo Forlanini Hospital, Rome - Italy
10. Department of Nephrology, General Hospital, Imperia - Italy
11. Nephrology and Dialysis Local Health Authority (AUSL) 12, Viareggio, Versilia Hospital, Lidodi Camaiore - Italy
12. Renal Unit, Salvatore Maugeri Foundation, Pavia - Italy