Society of Thoracic Surgeons - http://www.sts.org

American Heart Association - http://www.americanheart.org

WebMD - http://www.webmd.com

Dr. Koop - http://www.drkoop.com

Netscape's Health Channel - http://health.netscape.com

Heart Surgery Information Page - http://www.heart-surgeon.com

Methodist Healthcare System - http://www.sahealth.com