Cloning Said to Yield Human Embryos

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A biotechnology company in San Diego has produced the world's first cloned human embryos, as reported in the Feb 1 issue of the journal Stem Cells.  Their results are an important step towards creating "personalized" stem cell lines for use in medical therapies.  Cloning technology allows researchers to derive stem cell lines that are genetically identical to the recipient, thereby avoiding problems of immunorejection often seen in organ and tissue transplants.

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