Article Text
Research letter
On the popularity of the USB flash drive-shaped electronic cigarette Juul
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Footnotes
Contributors RK conceived the study, designed the data collection process and wrote the paper. SH collected the Twitter data; RK and SH performed associated analysis. EJH guided the study and reviewed drafts making important modifications.
Funding This work was supported by the U.S. National Cancer Institute through NIH grant R21CA218231.
Disclaimer The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH.
Competing interests None declared.
Patient consent Not required.
Provenance and peer review Not commissioned; externally peer reviewed.