[1] Med Univ Warsaw, Dept Pediat & Nephrol, Warsaw, Poland
[2] Med Univ Warsaw, Dept Pathol, Warsaw, Poland
[3] Jagiellonian Univ Cracow, Dept Pediat Nephrol, Krakow, Poland
[4] Med Univ Bialystok, Dept Pediat & Nephrol, Bialystok, Poland
[5] Med Univ Lublin, Dept Pediat Nephrol, Lublin, Poland
[6] Childrens Hosp, Dept Pediat & Nephrol, Torun, Poland
[7] Med Univ Gdansk, Dept Pediat Nephrol & Hypertens, Gdansk, Poland
[8] Silesian Med Univ, Dept Pediat, SMDZ Zabrze, Katowice, Poland
[9] Wroclaw Med Univ, Dept Pediat Nephrol, Wroclaw, Poland
[10] Childrens Mem Hlth Inst, Dept Nephrol Kidney Transplantat & Hypertens, Warsaw, Poland