[1] Azienda Osped Univ Parma, Dept Nephrol, Parma, Italy
[2] Med Univ Vienna, KH Elisabethinen Linz, Vienna, Austria
[3] Med Univ Vienna, Dept Nephrol, Vienna, Austria
[4] Hosp del Mar, Dept Nephrol, Barcelona, Spain
[5] Inst Clin & Expt Med, Dept Nephrol, Prague, Czech Republic
[6] Richard Bright Renal Unit, Bristol, Avon, England
[7] Charite, Dept Nephrol, D-13353 Berlin, Germany
[8] Univ Copenhagen, Rigshosp, Dept Nephrol P, DK-2100 Copenhagen, Denmark
[9] Univ Lille Nord France, Serv Nephrol, Lille, France
[10] Wroclaw Med Univ, Dept Nephrol & Transplantat Med, Wroclaw, Poland
[11] Univ Antwerp Hosp, Dept Nephrol, Antwerp, Belgium