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Nature 434, 1058 (28 April 2005) | doi:10.1038/4341058a; Published online 27 April 2005

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US experts draw up guidelines for stem-cell research

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Ethics committees should ban primate chimaera experiments.

US stem-cell research needs a coherent set of rules, according to experts from the National Academy of Sciences. Every institution working with human embryonic stem cells should create a committee to oversee the research, says the panel, which also recommends that some experiments should be banned.