[1] Bambino Gesu Pediat Hosp, Rome, Italy
[2] Res Ctr Irccs Rome, Rome, Italy
[3] Santobono Pausillipon Hosp, Pediat Nephrol Unit, Naples, Italy
[4] Irccs Burlo Garofolo, Inst Maternal & Child Hlth, Trieste, Italy
[5] Fdn Irccs Ca Granada Osped Maggiore Policlin, Pediat Nephrol Dialysis & Transplant Unit, Milan, Italy
[6] Azienda Osped Univ, Policlin Santorsola Malpighi, Nephrol & Dialysis Unit, Dept Pediat, Bologna, Italy
[7] Meyer Childrens Hosp, Nephrol & Dialysis Unit, Florence, Italy
[8] Childrens Hosp G Di Cristina Arnas Civ, Pediat Nephrol Unit, Palermo, Italy
[9] Regina Martgherita Childrens Hosp, City Hlth & Sci Turin Hlth Agcy, Turin, Italy
[10] Univ Hosp Padua, Pediat Nephrol Dialysis & Transplant Unit, Dept Pediat, Padua, Italy
[11] Ist Giannina Gaslini, Div Nephrol Dialysis Transplantat & Lab Pathophys, Genoa, Italy