1. Boston University School of Medicine and Boston Medical Center, MA (A.K.J).
2. Louisiana State University School of Medicine, New Orleans (M.A.).
3. Mayo Clinic, Rochester, MN (P.J.B.).
4. New Mexico Heart Institute, Albuquerque (M.B.).
5. University of Miami Hospital and Clinics, FL (M.G.C).
6. Harbor-University of California, Los Angeles, Medical Center (W.J.F.).
7. University of California, Los Angeles, Division of Cardiology (G.C.F.).
8. Duke University School of Medicine, Durham, NC (C.B.G., J.G.J., J.N.K.).
9. Emory University Hospital Midtown, Atlanta, GA (A.G.).
10. The Christ Hospital, Cincinnati, OH (T.D.H.).
11. American Heart Association, Dallas, TX (L.H.).
12. Baylor College of Medicine, The Michael E. DeBakey VA Medical Center, Houston, TX (H.J.).
13. Medical College of Wisconsin, Milwaukee (P.M.).
14. Cleveland Clinic, Lerner College of Medicine, Case Western Reserve University, OH (V.M.).
15. The Icahn School of Medicine at Mount Sinai, New York, NY (M.R.).
16. University of North Carolina at Chapel Hill (J.Z.H.).