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A Piece of My Heart, From My Arm

"Nightline's" Bill Weir reports on cutting-edge medicine that turns skin cells into cardiac tissue.
01/18/2013

Transcript for A Piece of My Heart, From My Arm

What if you could stockpile. A set a spare parts -- for your car for your body. You know extra -- some fresh -- a better all grown in a lab from a piece of your skin. The idea sounded like science... See More
This transcript has been automatically generated and may not be 100% accurate.
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