1. From the Division of Cardiology, University Hospital Eppendorf, Hamburg, Germany (T.M.); Institut für Pharmakologie und Toxikologie, Technische Universität, München, Germany (R.F., F.H.); the Institute of Cardiovascular Physiology, J.W. Goethe–University Clinic, Frankfurt/Main, Germany (A.M.); and the Institute of Clinical Biochemistry and Pathobiochemistry, University of Würzburg, Würzburg, Germany (S.M.L., U.W.).