@misc{indiciae39facdb68878,
  title = {A sinus problem?},
  author = {P Kalina and R Woldenberg and K Black},
  year = {1998},
  doi = {10.1259/bjr.71.849.10195020},
  url = {https://pubmed.ncbi.nlm.nih.gov/10195020/},
  note = {Source identifier: 10195020}
}