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Cotinine to Creatinine Ratios Lowered Only in Infants Residing in Homes That Ban Tobacco Smoking 

Infants living in homes that do not permit indoor tobacco smoking have significantly lower urinary cotinine to creatinine ratios than infants who reside where smoking is permitted according to the findings from a cross sectional survey of households in the United Kingdom.

Researchers report no difference in urinary cotinine to creatinine ratios among infants residing where either some or no remedies are used to reduce their exposure to environmental tobacco smoke.

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