[1] IKP Ctr Kiel GmbH, Inst Clin Pharmacol, Kiel, Germany
[2] Nephrol Zentrum, Dept Internal Med & Nephrol, Rendsburg, Germany
[3] Bayer HealthCare AG, Inst Clin Pharmacol, Wuppertal, Germany
[4] Bayer HealthCare AG, Dept Biometry, Pharmacometry, Wuppertal, Germany
[5] Johanniter Klinikum Oberhausen, KfH Nieren Zentrum, Oberhausen, Germany
[6] Univ Essen Gesamthsch, Sch Med, Clin Nephrol & Hypertens, Essen, Germany