Intellectual property. Groups challenge key stem cell patents.
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D000818:Animals; D002460:Cell Line; D033041:Embryo Research / Q000331:legislation & jurisprudence*; D004622:Embryo, Mammalian / Q000166:cytology; D004625:Embryo, Nonmammalian; D005582:Foundations / Q000331:legislation & jurisprudence*; D010330:Patents as Topic / Q000331:legislation & jurisprudence*; D013234:Stem Cells; D014481:United States