[1] UCL, Dept Renal Med, London, England
[2] Imperial Coll London, Med Res Council Lab Med Sci, London, England
[3] Radboud Univ Nijmegen, IQ Hlth, Med Ctr, Nijmegen, Netherlands
[4] Radboud Univ Nijmegen, Med Ctr, Div Pediat Urol, Nijmegen, Netherlands
[5] Univ Amsterdam, Med Ctr, Emma Childrens Hosp, Dept Pediat Nephrol, Amsterdam, Netherlands
[6] UZ Leuven, Dept Paediat Nephrol, Leuven, Belgium
[7] UCL, Dept Res Pathol, London, England