@misc{indiciaed9ebe9c87504,
  title = {Paranasal sinus diseases.},
  author = {H Ludman},
  year = {1981},
  doi = {10.1136/bmj.282.6269.1054},
  url = {https://pubmed.ncbi.nlm.nih.gov/6783245/},
  note = {Source identifier: 6783245}
}