E-cigarette Unit Sales, by Product and Flavor Type - United States, 2014-2020.
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MMWR Morb Mortal Wkly Rep. 2020 Sep 18;69(37):1313-1318. doi: 10.15585/mmwr.mm6937e2.
MMWR Morb Mortal Wkly Rep. 2020.
PMID: 32941416
Free PMC article.