[1] Univ Amsterdam, Acad Med Ctr,European Dialysis & Transplant Assoc, Amsterdam Publ Hlth Res Inst,European Soc Pediat, European Renal Assoc,Dept Med Informat, Amsterdam, Netherlands
[2] Bordeaux Univ Hosp, Pediat Nephrol Unit, Bordeaux, France
[3] Hop Archet2, Ctr Hosp Univ Nice, Dept Pediat Nephrol, Nice, France
[4] Sophia Childrens Univ Hosp, Dept Pediat Nephrol, Erasmus Med Ctr, Rotterdam, Netherlands
[5] Hacettepe Univ, Div Pediat Nephrol, Dept Pediat, Fac Med, Ankara, Turkey
[6] Carol Davila Univ Med & Pharm, Dr Carol Davila Teaching Hosp Nephrol, Dept Internal Med & Nephrol, Bucharest, Romania
[7] Karolinska Inst, Karolinska Univ Hosp Huddinge, Stockholm, Sweden
[8] Fundeni Clin Inst, Dept Pediat Nephrol, Bucharest, Romania
[9] Carol Davila Univ Med, Pediat, Bucharest, Romania
[10] Helsinki Univ Hosp, Dept Pediat Nephrol & Transplantat, Helsinki, Finland
[11] Univ Helsinki, Helsinki, Finland
[12] Med Univ Vienna, Dept Pediat & Adolescent Med, Div Pediat Nephrol & Gastroenterol, Vienna, Austria
[13] Univ Autonoma Barcelona, Hosp Univ Vall dHebron, Pediat Nephrol Dept, Barcelona, Spain
[14] Univ Bern, Inst Social & Prevent Med, Bern, Switzerland
[15] Landspitali, Div Nephrol, Reykjavik, Iceland
[16] Univ Iceland, Sch Hlth Sci, Fac Med, Reykjavik, Iceland
[17] Guys & St Thomas Natl Hlth Serv Fdn Trust, Evelina London Childrens Hosp, Dept Pediat Nephrol, London, England
[18] CaGranda Osped Maggiore Policlin, Fdn Inst Ricovero & Cura Carattere Sci, Pediat Nephrol & Dialysis Unit, Milan, Italy
[19] Emma Childrens Hosp, Acad Med Ctr, Dept Pediat Nephrol, Amsterdam, Netherlands