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2. Electronic nicotine delivery system landscape in licensed tobacco retailers: results of a county-level survey in Oklahoma;Brame;BMJ Open.,2016
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4. History and Current Trends in the Electronic Nicotine Delivery Systems Retail Marketplace in the United States: 2010–2016;Cantrell;Nicotine Tob. Res.,2018
5. Notes from the Field—United States, 2011–2018;Cullen;MMWR Morb. Mortal Wkly Rep,2018