1. Emory University, Atlanta, GA (G.A.E.).
2. University of Texas Health Science Center at Houston, Houston, TX (G.S.O., E.R.T.).
3. University of North Carolina Health Care, Chapel Hill, NC (M.A.F.).
4. Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil (L.R.d.S.).
5. University of California, Los Angeles, CA (W.J.Q.-B., J.C.J.).
6. University of Michigan Cardiovascular Center, Ann Arbor, MI (H.J.P., J.L.E.).
7. University of Florida Health, Gainesville, FL (G.R.U.).
8. University of Texas Southwestern, Dallas, TX (C.H.T.).
9. Johns Hopkins Bayview Medical Center, Baltimore, MD (J.H.B).
10. Weill Cornell Medicine, New York-Presbyterian Hospital, New York, NY (S.H.E.).
11. MedStar Health, Washington, DC (E.Y.W.).
12. Dartmouth-Hitchcock Medical Center, Lebanon, NH (M.F.F.).
13. University of Pittsburgh Medical Center, Pittsburgh, PA (M.J.S.).
14. Stanford University Medical Center, Stanford, CA (J.T.L.).
15. Cleveland Clinic Martin Health, Port St. Lucie, FL (P.L., M.K.).
16. Mayo Clinic, Rochester, MN (P.G., M.K.).
17. Schulich School of Medicine and Dentistry, Western University, London, Ontario; Canada (A.A.D.).
18. Cleveland Clinic Foundation, Cleveland, OH (S.P.L.).