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Nature Medicine 13, 6 (1 January 2007) | doi:10.1038/nm0107-6b;

Companies balk at California's patent rules for stem cell research

Brandon Keim

California is set to adopt rules that will guarantee public return on its state-funded stem cell research, requiring grantees to share patented materials, send a portion of revenues to the state and guarantee cheap treatments to Californians. But the rules, which could set the tone for other state-funded science programs, are too restrictive and might put off companies, industry representatives warn.

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