1. Warren Alpert Medical School, Brown University, Providence, RI (B.G.A.)
2. Cardiovascular Imaging Technologies, Kansas City, MO (J.A.C.)
3. Harvard Medical School, Brigham and Women’s Hospital, Boston, MA (S.D.)
4. Columbia University Irving Medical Center and New York-Presbyterian Hospital, New York, NY (A.J.E.)
5. Emory University School of Medicine, Atlanta, GA (J.R.G.)
6. Duke University Medical Center, Durham, NC (R.P.)
7. Department of Cardiology, Deborah Heart and Lung Center, Browns Mills, NJ (R.P.B-P.)
8. Department of Medicine, University of Pittsburgh, Pittsburgh, PA (P.S.)
9. University of Ottawa Heart Institute, Ottawa, Canada (R.G.W.)