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Previous Volume 351:102 July 1, 2004 Number 1 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: In their review of acute lymphoblastic leukemia, Pui et al. (April 8 issue)¹ discuss environmental factors that may interact with a genetic disposition to cause the disease. The authors claim that "exposure to residential magnetic fields has largely been excluded as an instigating factor" and cite one large study² in support of this statement. However, they overlook two independent meta-analyses^3,4 that showed an association, with a doubling of the risk of childhood leukemia with household exposures to magnetic fields of 4.0 mG (0.4 µT) or higher. Subsequently, the International Agency for Research on Cancer classified 50- or . . . [Full Text of this Article]

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