However, a large degree of variation was noted in both the direction and magnitude of the associations between the five socioeconomic and demographic characteristics and smokeless tobacco use across countries (supplementary figures S19-S23)
I've always been a money worrier
Science 288 , 18351838 (2000)
This opposition has been underpinned by questionable claims that this commentary and previous research [27, 73] has addressed particularly regarding the prevalence and effects of vaping among young people, including the discredited gateway effect, and the potential effectiveness of law enforcement in curtailing black market activity
We pooled snuff and chewing tobacco users in our analysis because snuff and chewing tobacco users tend to misclassify themselves and the health effects of the two product types do not significantly differ [30]
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