Tobacco Smoke Exposure and Eustachian Tube Disorders in US Children and Adolescents.

PLoS One · 2016 · PMC5053406 · PMID 27711178

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The second study conducted in 1990 reported a significant trend of growing prevalence of Type B tympanograms with increasing numbers of smokers in the home (χ 2 = 4.15, p<0.05) [ 28 ].

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