1. Institute of Clinical Pharmacology, University Hospital of Mannheim, Faculty for Clinical Medicine Mannheim, University of Heidelberg (B.M.W.S., N.M., A.C.G., H.-C.T., M.F., M.C., M.W.), 68135 Mannheim, Germany
2. Medical Department 4/Nephrology, University of Erlangen-Nürnberg (B.M.W.S.), 90471 Nürnberg, Germany