[1] Univ Amsterdam, Acad Med Ctr, ESPN ERA EDTA Registry, NL-1105 AZ Amsterdam, Netherlands
[2] Univ Bologna, Azienda Osped Univ St Orsola Malpighi, Pediat Nephrol & Dialysis Unit, Bologna, Italy
[3] Heidelberg Univ, Heidelberg, Germany
[4] Univ Amsterdam, Acad Med Ctr, Emma Childrens Hosp, NL-1105 AZ Amsterdam, Netherlands
[5] Gaslini Childrens Hosp, Genoa, Italy