1. Duke Clinical Research Institute, Duke University, Durham, North Carolina, and Libin Cardiovascular Institute, University of Calgary, Calgary, Alberta, Canada (D.S.C.)
2. Duke-National University of Singapore Medical School, Singapore (K.Z.)
3. Duke Clinical Research Institute, Duke University, and Division of Cardiology, Duke University Medical Center, Durham, North Carolina (S.D.P., S.V., M.R.P., J.P.P.)
4. Duke-National University of Singapore Medical School, Singapore, and Division of General Internal Medicine, Duke University Medical Center, Durham, North Carolina (D.B.M.)
5. University of Colorado School of Medicine, Aurora, Colorado (L.A.A.)
6. Division of Cardiology, Duke University Medical Center, Durham, North Carolina (K.P.J.)
7. Division of Cardiology, Duke University Medical Center, Durham, North Carolina, and Department of Medicine, Aga Khan University, Karachi, Pakistan (Z.S.)
8. Yale University School of Medicine, New Haven, Connecticut (J.V.F.).