Survey of 3565 commissioned by Welsh Labour to support their atrocious vaping ban in "public" places failed to find a single ecig user who wasn't previously a smoker, thus completely obliterating the gateway myth. However, Welsh Labour didn't like those findings, so they arbitrarily dismissed them and instead wrote a report based on a discredited gateway paper from USA.
http://www.walesonline.co.uk/news/wales-news/questions-raised-over-whether-e-10224276
http://www.walesonline.co.uk/news/wales-news/questions-raised-over-whether-e-10224276