Smith – Are E-Cigarette Flavors Associated with Exposure to Nicotine and Toxicants? Int J Environ Res Public Health 2019 Are E-Cigarette Flavors Associated with Exposure to Nicotine and Toxicants? Findings from Wave 2 of the Population Assessment of Tobacco and Health (PATH) Study Danielle M. Smith, Liane M. Schneller, Richard J. O’Connor, and Maciej L. Goniewicz