Water distribution system deficiencies and gastrointestinal illness: a systematic review and meta-analysis.

Environ Health Perspect · 2014 · PMC4080524 · PMID 24659576

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a significant trendno p-value reported

(1991 , 1997 ) classified the volume of water intake as a three-level categorical variable and detected a significant trend in GII incidence with respect to these categories, whereas Nygård et al.

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