1. Cardiac Ultrasound Laboratory (Y.N., P.B.B., H.A., J.P.D.-B., L.H., M.H.P., J.H., R.A.L.), Massachusetts General Hospital, Harvard Medical School, Boston.
2. Department of Radiology (V.B., G.H.), Massachusetts General Hospital, Harvard Medical School, Boston.
3. Greenberg Cardiology Division, Department of Medicine, Weill Cornell Medical College, New York, NY (J. Kochav, R.D.K., R.S., P.V.C., B.Y., J. Kim, J.W.W.).
4. School of Cardiovascular Disease, University of Pisa, Italy (K.U.).
5. Cardiac Surgery (A.v.K., S.M.), Massachusetts General Hospital, Harvard Medical School, Boston.
6. University Department for Cardiac Surgery, Leipzig Heart Center, University of Leipzig, Saxony, Germany (A.v.K., M.A.B.).
7. Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston (J.E.M., R.M., R.A.N.).
8. Surgical Cardiovascular Laboratory (J.L.G.), Massachusetts General Hospital, Harvard Medical School, Boston.
9. Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Boston (T.G.N.).
10. Division of Cardiovascular Medicine, University of California, San Francisco (F.N.D.).