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Title
Most smokeless tobacco use is not a causal gateway to cigarettes: using order of product use to evaluate causation in a national US sample.
Authors
Kozlowski, Lynn T; O'Connor, Richard J; Edwards, Beth Quinio; Flaherty, Brian P
Abstract
To evaluate non-causal and causal patterns of smokeless tobacco (SLT) and cigarette use; to assess the prevalence of 'non-gateway' and possible 'gateway' patterns of SLT use.