The optimal state of the mouth and normal functioning of the organs of the mouth without evidence of disease.
E- cigarette use worldwide
This review assessing the epidemiological profile of e-cigarette users worldwide included 43 studies from 28 countries. A majority (60% of studies were considered to be at low risk of bias. The findings provide prevalence estimates and suggest that the highest proportion of e-cigarette users was in the 18- to 24 age group.
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