@misc{indiciae2a86f49ce4b6,
  title = {Periodontitis and systemic disease.},
  author = {S P Engebretson and E Lalla and I B Lamster},
  year = {1999},
  url = {https://pubmed.ncbi.nlm.nih.gov/10581932/},
  note = {Source identifier: 10581932}
}