Use of e-cigarettes in UK has tripled in two years, finds survey.

@article{Kmietowicz2014UseOE,
  title={Use of e-cigarettes in UK has tripled in two years, finds survey.},
  author={Zosia Kmietowicz},
  journal={BMJ},
  year={2014},
  volume={348},
  pages={g2987}
}