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Previous Volume 351:1797-1798 October 21, 2004 Number 17 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: It is disappointing that Daley has changed his position on embryonic stem cells to make a political statement. In his Perspective article (Aug. 12 issue),¹ he makes no mention of the utility of adult stem cells, despite his previous enthusiasm for their use. Earlier this year, Daley coauthored an article² in which he and his colleagues state that neurologic stem cells have "a distinct advantage over fetal tissue" because of their greater ability to circumvent the restrictions of the blood–brain barrier and integrate throughout the central nervous system. Also, "a disease of a particular organ system is . . . [Full Text of this Article]

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