The alpha diversity of the microbial community composition was assessed by the Shannon index, Chao1 index, and Simpson index, and the diversity and richness of the microbial community composition varied with the stage of modulation (Tab
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The agency renewed its reduced-risk authorization for eight General Snus products, permitting the marketing claim that switching completely from cigarettes to these products lowers the risk of mouth cancer, heart disease, lung cancer, stroke, emphysema, and chronic bronchitis
6 Each year, primarily due to secondhand smoke exposure, an estimated 7,300 non-smoking Americans die of lung cancer
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