Stem cell hopes fuel policy woes.
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D002170:Canada; D004622:Embryo, Mammalian / Q000166:cytology*; D005060:Europe; D006801:Humans; D012106:Research / Q000331:legislation & jurisprudence*; D012109:Research Support as Topic / Q000331:legislation & jurisprudence; D012926:Social Control, Formal; D013234:Stem Cells; D014481:United States