@misc{indiciaeb44c42c27152,
  title = {Technical variations in clinical ostial patency tests.},
  author = {A E Kortekangas and T Rantanen},
  doi = {10.3109/00016487609119957},
  url = {https://pubmed.ncbi.nlm.nih.gov/1266608/},
  note = {Source identifier: 1266608}
}