1. Division of Cardiology, Inova Heart and Vascular Institute, Fairfax, VA (C.M.R., L.G., B.N.T., M.A., H.B., S.C., A.A.D., S.S.D., A.E., G.M., A. Maghsoudi, I.M.S., M.C.F., M.W.S., S.S.S., C.M.O’C., C.R.d.F.).
2. Fairfax Radiology Centers, VA (M.A.).
3. Departments of Internal Medicine and Pathology, University of Texas Southwestern Medical Center, Dallas, TX (J.A.d.L., A.K., A. Muthukumar).
4. Virginia Heart, Falls Church, VA (I.M.S., A. Maghsoudi).
5. Division of Cardiology, Duke University, Durham, NC (C.M.O’C.).