1. From the Hypertension and Diabetes Research Unit, Max Grundig Clinic, Bühl (W.-I.J., T.H., S.W., M.B., F.v.E., G.J.D.); the Division of Pediatric Cardiology, University of Tübingen (L.S., J.B., O.S., J.A.); and the Physikalisches Institut, University of Tübingen (W.-I.J., T.H., S.W., O.S., M.B., O.L.), Germany.