biochemical verification of tobacco use and cessation Addressing Pediatric Use: Strategies for Clinicians Assessing outcome in smoking cessation
Assessing outcome in smoking cessation studies. Center for Research on Tobacco and Health College of Medicine Penn State Observational studies of exposure to tobacco and nicotine products: Best practices for maximizing statistical precision and accuracy ScienceDirect Effectiveness of the national German quitline for smoking cessation: study protocol of a randomized controlled trial BMC Public Health Springer Nature Link
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