[1] Charite, Dept Nephrol & Internal Intens Care Med, D-13353 Berlin, Germany
[2] Gambro Dialysatoren GmbH, Res & Dev, Hechingen, Germany
[3] Univ Halle Wittenberg, Dept Internal Med 2, D-06108 Halle, Germany
[4] Univ Tubingen, Inst Epidemiol & Appl Biometry, Tubingen, Germany
[5] Univ Halle Wittenberg, Inst Chem Food Chem, D-06108 Halle, Germany
[6] NMI Technol Transfer GmbH, Res, Reutlingen, Germany