Japan lab cannot repeat ground-breaking cell finding

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 spiraled into a scandal that included a respected researcher's suicide, reports said Thursday. The government-backed Riken Institute will announce Friday that so-called ''STAP'' cells cannot be reproduced, writing the embarrassing final chapter of a study published in the journal Nature but later withdrawn, according to national broadcaster NHK.

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