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Nature 438, 262-263 (17 November 2005) | doi:10.1038/438262a; Published online 16 November 2005

Stem-cell brothers divide

David Cyranoski & Erika Check

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Famous co-authors part company over egg-donation controversy.

Stem-cell researchers worldwide have been dismayed and confused by the abrupt end of the highest-profile collaboration in their field.Over the weekend, the University of Pittsburgh's Gerald Schatten suddenly accused Woo Suk Hwang of possible irregularities in the donation of eggs used for his research.

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