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Stem Cell Breakthrough Defuses Debate
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Scottish researcher Ian Wilmut, famous for his role in cloning Dolly the sheep a decade ago, has said he is giving up the cloning approach to produce stem cells and plans to pursue direct reprogramming instead.
Other scientists said it's too early for the field to give up studying stem cells from embryos.
Dr. George Daley of the Harvard institute, who said his own lab has also achieved direct reprogramming of human cells, said it's not clear how long it will take to get around the cancer risk problem.
His lab is pursuing both the reprogramming and cloning strategies.
"We'll see, ultimately, which one works and which one is more practical," he said,
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