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COPD is a major global health problem and the third leading cause of death worldwide

In smokeless-tobacco-consuming healthy samples, there were strong intercorrelations between Prevotella , Selenomonas , Leptotrichia , Capnocytophaga , Catonella , Neisseria , Campylobacter , and Fusobacterium ( Supplementary Tables 5 , 6 )

Ultrasensitive high-resolution mass spectrometric analysis of a DNA adduct of the carcinogen benzo[ a ]pyrene in human lung

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They noted that while users are generally young, white men who are less educated, there is now no significant relationship to geographic region, income, and race/ethnicity, as in the past