Affiliation: | 1. NHLBI's Framingham Heart Study, Framingham, Massachusetts, USA;2. Department of Medicine (Cardiovascular Division), University of Pennsylvania Medical School, Philadelphia, Pennsylvania, USA;3. Department of Medicine (Cardiovascular Division), Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA;4. Harvard Medical School, Boston, Massachusetts, USA;5. Department of Medicine (Division of Cardiology), Massachusetts General Hospital, Boston, Massachusetts, USA;6. Department of Radiology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA |