Affiliation: | a From the Division of Medicine, Evans Department of Clinical Research and the Department of Medicine, University Hospital, Boston, Massachusetts, USA b From the Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA c From the University of Washington, Seattle, Washington, USA d From the Mayo Clinic, Rochester, Minnesota, USA e From the Medical College of Virginia, Charlottesville, Virginia, USA f From the Montreal Heart Institute, Montreal, Canada; and Participating Sites |