1. From the Department of Nephrology and Hypertension (J.T., K.B., R.L., R.V., K.-U.E., K.F.H.), Friedrich-Alexander-University, Erlangen-Nürnberg, Germany; Charité Campus Buch (F.C.L.), Franz Volhard Clinic, HELIOS Klinikum-Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; Institute of Biochemistry (P.D.), Charité Campus Benjamin Franklin, Berlin, Germany; Federal Research Centre for Nutrition and Food (H.W.), Kulmbach, Germany.