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To observe the association between childhood leukemia and magnetic field exposure.The literature was searched by PubMed, ProQuest, Web of Science (SCI) and Medline databases during 1997–2013. Heterogeneity in several studies was weighted by I-squared value. Publication bias was tested by funnel plot and Egger's test. Odds ratio (OR) and 95% CI were used to evaluate the association strength. The statistical...
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