Japan's Riken Institute to announce that Stap cells cannot be reproduced

Scientist Haruko Obokata at Japan's Riken research institute announces her research into so-called Stap cells in the western city of Kobe. Photo: Kyodo Some of Japan's top scientists have been unable to reproduce results of what was once billed as a ground-breaking stem cell study, but which spiralled into a scandal that included a respected researcher's suicide, reports said yesterday.

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