Maternal and Child Risk Factors.
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aReferent (First quartile), <0.87 wells per mile; Second quartile, 0.87 to 2.59 wells per mile; Third quartile, 2.60 to 5.99 wells per mile; Fourth quartile, ≥6.00 wells per mile. bDifference between quartiles is significant (p<0.05). Maternal and Child Risk Factors.
创建时间：
2015-06-03
