1. From the Medizinische Klinik I (P.A.A.-L., K.H., A.S., J.B., T.Q., J.G., V.J., G.E., T.P.), University of Würzburg, Würzburg, Germany; Schering AG Berlin (K.-H.F., C.H.-H.), Berlin, Germany; and the Division of Cardiology (L.N.), University of Manchester, Manchester, United Kingdom.