American College of Cardiology
American Heart Association
American Medical Association
American Society of Nuclear Cardiology
Baylor Health Care System
Baylor Hamilton Heart and Vascular Hospital
CardioSmart – American College of Cardiology
Heart Authority
Journal of the American Society of Echocardiography
National Geographic – The Interactive Heart
WebMD.com
drkoop.com
FDA Center For Food Safety
National Institutes of Health
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