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Behind the Myth: Potential of Stem Cells Despite the enthusiasm for embryonic stem cell research exhibited by patient advocacy groups and some politicians, no one knows when -- or if -- the research would lead to new treatments for diseases. NPR's Joe Palca examines the challenging potential of embryonic stem cells.

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Behind the Myth: Potential of Stem Cells

Heard on All Things Considered

Behind the Myth: Potential of Stem Cells

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Despite the enthusiasm for embryonic stem cell research exhibited by patient advocacy groups and some politicians, no one knows when — or if — the research would lead to new treatments for diseases. NPR's Joe Palca examines the challenging potential of embryonic stem cells.