[1] Leiden Univ, Med Ctr, Leiden, Netherlands
[2] Addenbrookes Hosp, Renal Unit, Cambridge, England
[3] Hammersmith Hosp, W London Renal & Transplant Ctr, London, England
[4] Rigshosp, DK-2100 Copenhagen, Denmark
[5] Hop Necker Enfants Malad, INSERM, U8456, Paris, France
[6] Osped San Carlo Borromeo Milano, Renal Immunopathol Ctr, Milan, Italy
[7] Univ Heidelberg, Heidelberg, Germany
[8] Meander Med Ctr, Amersfoort, Netherlands