1. Division of Cardiology, Weill Cornell Medicine-Qatar, Doha (I.Y.E.).
2. Heart and Vascular Institute, University of Pittsburgh Medical Center, PA (S.B., A.F.B.).
3. Division of Cardiovascular Medicine, University of Florida, Gainesville (C.J.P.).
4. Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St Louis, MO (K.J.L.).
5. Department of Neurology, Division of Stroke and Cerebrovascular Disease, Columbia University Vagelos College of Physicians and Surgeons, New York, NY (E.C.M.).