1 Nephrology and Dialysis Unit, Ospedale San Carlo Borromeo, University of Milano, via Pio II, 3, 20153, Milan, Italy. maurizio.gallieni@fastwebnet.it.
2 Second University of Naples, Naples, Italy.
3 University of Messina, Messina, Italy.
4 Dolo General Hospital, Dolo-Venice, Italy.
5 Ospedali di Savigliano e Ceva, ASL Cuneo 1, Cuneo, Italy.
6 Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy.
7 S.M. Annunziata Hospital, Florence, Italy.
8 SS Annunziata Hospital, Sassari, Italy.
9 University of Turin, Turin, Italy.
10 S. Maria della Misericordia Hospital, Perugia, Italy.
11 S. Camillo Forlanini Hospital, Rome, Italy.
12 University Federico II, Naples, Italy.
13 Ospedale San Paolo, Civitavecchia, Italy.
14 C. Poma Hospital, Mantova, Italy.
15 Ospedale Fracastoro, San Bonifacio, Italy.
16 Fondazione IRCSS Policlinico S. Matteo and University of Pavia, Pavia, Italy.