| http://www.w3.org/ns/prov#value | - During most of the 20th century, use of these products declined in Europe and North America, but a reverse trend in prevalence of use has been reported in the past few decades, particularly among people younger than 40.1 These products have been proposed as an alternative to cigarettes and other smoking products under the claim of a smaller, or negligible, risk to health.2 Smokeless tobacco is a r
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