1. From the Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (A.G., E.B., C.S., W.R.B.); Department of Experimental Physics V, University of Würzburg, Würzburg, Germany (A.G., Y.-X.Y., E.R., P.M.J., V.H.); Research Center Magnetic Resonance Bavaria (MRB), Würzburg, Germany (G.L., P.M.J.); Comprehensive Heart Failure Center/Deutsches Zentrum für Herzinsuffizienz, University of Würzburg, Würzburg, Germany (Y.-X.Y., W.R.B.); and Department of Cardiology, University Heart...