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Study: Stem cells from strangers can repair hearts

Even fit baby boomers won't escape heart problems

Doctors debate value of 'fringe' heart treatment

Surgery seems best for heart disease in diabetics

Saudi Arabia confirms 2nd case of SARS-like virus

Meningitis outbreak toll: 419 cases, 30 deaths

Floods render NYC hospitals powerless

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Man climbs Chicago skyscraper using bionic leg