[1] Univ Lyon 1, Dept Nephrol, F-69365 Lyon, France
[2] Guys & St Thomas NHS Fdn Trust, Dept Nephrol Nutr & Dietet, London, England
[3] Vrije Univ Amsterdam, Med Ctr, Dept Nephrol, Cardiovasc Res Inst, Amsterdam, Netherlands
[4] Univ Hosp Wurzburg, Div Nephrol, Dept Med, Wurzburg, Germany
[5] Ege Univ, Fac Med, Div Nephrol, Dept Med, Izmir, Turkey
[6] Lapeyronie Univ Hosp, Nephrol Dialysis & Intens Care Unit, Montpellier, France
[7] Univ Cologne, Fac Med, Med Clin 1, Hosp Merheim, Cologne, Germany
[8] Univ Hosp, Div Nephrol, Dept Internal Med, Maastricht, Netherlands
[9] Reina Sofia Univ Hosp, Dept Nephrol, Cordoba, Spain
[10] Bolognini Hosp, Div Nephrol & Dialysis, Seriate, Italy
[11] SM Annunziata Hosp, Nephrol Unit, Florence, Italy
[12] St James Univ Hosp, Dept Renal Med, Leeds, W Yorkshire, England
[13] Univ Hosp, Dept Surg, Maastricht, Netherlands
[14] Ghent Univ Hosp, Dept Internal Med, Nephrol Sect, B-9000 Ghent, Belgium