@misc{9476,
  author = {K. Thomas and R. Martin and N. Davies and C. Metcalfe and F. Windmeijer and D. Gunnell},
  title = {Smoking cessation treatment and risk of depression, suicide, and self harm in the Clinical Practice Research Datalink: prospective cohort study},
  year = {2013},
  journal = {Bmj},
  volume = {347},
  pages = {f5704},
  issn = {0959-8138},
  doi = {10.1136/bmj.f5704},
}