1. Department of Medicine, West Virginia University, 1 Medical Center Drive, Morgantown, WV 26505, USA
2. Michael E. DeBakey Veterans Affair Medical Center, Department of Medicine, Baylor College of Medicine, 2002 Holcombe Blvd, Houston, TX 77030, USA
3. Department of Medicine, John H Stroger Jr. Hospital of Cook County, 1969 Ogden Ave, Chicago, IL 60612, USA
4. Department of Cardiology, Keele Cardiovascular Research Group, Keele University, Stoke-on-Trent, UK
5. Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH 44195, USA
6. Department of Cardiovascular Medicine, Mayo Clinic, 200 1st St SW, Rochester, MN 55905, USA
7. Division of Cardiology, Department of Medicine, Johns Hopkins School of Medicine, 600 North Wolfe Street, Blalock 524-D1, Baltimore, MD 21287
8. The Ciccarone Center for the Prevention of Cardiovascular Disease, Johns Hopkins School of Medicine, 600 North Wolfe Street, Blalock 524-D1, Baltimore, MD 21287, USA