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Transcript for Human Heart Tissue From Bill Weir's Arm
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This transcript has been automatically generated and may not be 100% accurate.
{"duration":"0:33","description":"Mayo Clinic uses stem cell technology to turn cells from \"Nightline\" anchor's arm into heart cells.","mediaType":"default","section":"ABCNews/Nightline","id":"18253132","title":"Human Heart Tissue From Bill Weir's Arm","url":"/Nightline/video/human-heart-tissue-bill-weirs-arm-18253132"}