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A study by a team of Japanese scientists claiming they could dip blood cells in acid and they turned into stem cells is now being retracted. Many laboratories have agreed that the method could not recreate their published results.

“When conducting the experiment, I believed it was absolutely right,” commented Teruhiko Wakayama, a professor at Japan’s University of Yamanashi and contributor to the work, who continued:
But now that many mistakes have emerged, I think it is best to withdraw the research paper once and, using correct data and correct pictures, to prove once again the paper is right. If it turns out to be wrong, we would need to make it clear why a thing like this happened.
Hopefully they'll find an easier and better way to make stem cells out of blood cells.  [Reuters]