1. From the Departments of Cardiology and Angiology (D.H.-K., A.K., M.F., G.K., E.P., K.G., K.C.W., A.H., H.D.) and Nephrology (I.K.), Hannover Medical School, Hannover, Germany; and Department of Cardiology, Bialystok Medical School, Bialystok, Poland (K.K.).