@misc{indiciae89f0ce6c8551,
  title = {Smile with a service.},
  author = {S Hancocks},
  year = {1993},
  doi = {10.1038/sj.bdj.4808199},
  url = {https://pubmed.ncbi.nlm.nih.gov/8518052/},
  note = {Source identifier: 8518052}
}