1. Division of Cardiology West Virginia University School of Medicine Morgantown West Virginia USA
2. Division of Cardiovascular Medicine University of California San Diego La Jolla California USA
3. Knight Cardiovascular Institute Oregon Health and Science University Portland Oregon USA
4. Division of Cardiology, Johns Hopkins Ciccarone Center for the Prevention of Cardiovascular Disease Johns Hopkins University School of Medicine Baltimore Maryland USA
5. Department of Cardiovascular Diseases Mayo Clinic School of Medicine Rochester Minnesota USA