@misc{indiciae3200a8ff820f,
  title = {Sputum or spit?},
  author = {K M Unger},
  year = {1979},
  doi = {10.1378/chest.76.5.498},
  url = {https://pubmed.ncbi.nlm.nih.gov/498818/},
  note = {Source identifier: 498818}
}