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Page last updated at 07:53 GMT, Friday, 9 January 2009

Stem cell research development 'promising'

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British scientists have come up with a way of dramatically enhancing the body's ability to repair itself. Dr Sarah Rankin, of Imperial College London, technology correspondent Tom Feilden, and Roger Pederson, professor of regenerative medicine at the University of Cambridge, discuss how the body can be made to release a flood of stem cells into the bloodstream - enabling the body, potentially, to repair heart tissue after a heart attack or even mend broken bones.

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