1. From Clinical Cardiology, National Heart and Lung Institute, Imperial College School of Medicine (W.D., M.R., F.L.-L., A.J.S.C., S.D.A.), and the Department of Clinical Chemistry, Charing Cross Campus, Imperial College School of Medicine (D.V.P., D.A.R.), London, UK; and the Franz-Volhard-Klinik (Charité, Campus Berlin Buch) at Max Delbrück Centrum for Molecular Medicine, Berlin (W.D., S.D.A.), and the University of Leipzig, Division of Cardiology, Heart Center, Leipzig (N.S., G.S., R.H.), Germany.