@misc{indiciae3ad536e084b2,
  title = {Letter: Self-help groups in the smoking problem.},
  author = {D Illingworth and J Pepper},
  year = {1976},
  doi = {10.1136/bmj.1.6018.1147-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/1268599/},
  note = {Source identifier: 1268599}
}