1. From the Department of Internal Medicine III (F.E., A.M.N., H.D., K.M.D., E.C., E.E., N.G.), Institute of Medical Statistics, Informatics and Epidemiology (M.H.), Renal Division, Department of Medicine (T.K., T.B., V.B.), and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (T.K., T.B., V.B.), University of Cologne, Cologne, Germany.