Fig. 1From: Effect of Massachusetts House Bill No. 4196 on electronic cigarette use: a mixed-methods studyInterrupted time-series analysis of year-on-year e-cigarette sales per capita. This figure shows the data points and interrupted time-series regressions associated with each group. Vertical lines indicate the weeks in which the EVALI outbreak and related policy statements, beginning of the Massachusetts e-cigarette ban, end of the ban, coronavirus measures, and Massachusetts excise tax occurred, respectivelyBack to article page