@misc{indiciae6f8ef41c09ce,
  title = {A closed system for frontal sinus irrigation.},
  author = {B Singh},
  year = {1990},
  doi = {10.1177/019459989010300329},
  url = {https://pubmed.ncbi.nlm.nih.gov/2122388/},
  note = {Source identifier: 2122388}
}