1. From the Department of Biomedical Engineering (W.Z., T.L.V., P.H., J.D.M., P.A., K.M.N., J.R.S.), Washington University in St Louis, MO
2. Molecular Cardiology, IRCCS Salvatore Maugeri Foundation, Pavia, Italy (A.M., S.G.P.)
3. Division of Cardiology, Department of Medicine (J.D.M.), Washington University in St Louis, MO
4. Department of Molecular Medicine, University of Pavia, Italy (S.G.P.).