[1] Univ Children Hosp Zurich, Zurich, Switzerland
[2] Univ Childrens Hosp, Dept Paediat 1, Heidelberg, Germany
[3] Clin Trapianto Renale Bambino Gesu, Rome, Italy
[4] Childrens Hosp Med High Sch, Hannover, NH, Germany
[5] Univ Padua, Dept Paediat, Paediat Nephrol Dialysis & Transplant Unit, Padua, Italy
[6] Univ Childrens Hosp, Hamburg, Germany
[7] Univ Childrens Hosp, Munster, Germany
[8] Univ Childrens Hosp, Essen, Germany
[9] Univ Childrens Hosp, Paediat 1, Tubingen, Germany
[10] Charite Campus Virchow Hosp, Paediat Nephrol, Berlin, Germany
[11] Royal Childrens Hosp, Manchester, Lancs, England
[12] Univ Hosp Tuebingen, Tubingen, Germany
[13] Univ Childrens Hosp, Bonn, Germany
[14] Univ Childrens Hosp, Freiburg, Germany
[15] Childrens Hosp, Memmingen, Germany
[16] Boris Petrousky Sci Ctr Surg Rams, Moscow, Russia
[17] Hacettepe Univ, Dept Pediat Nephrol, Fac Med, Ankara, Turkey