@misc{indiciaee63672cbc163,
  title = {Filters in breathing systems.},
  author = {G B Drummond},
  year = {1999},
  doi = {10.1046/j.1365-2044.1999.96794h.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/10403883/},
  note = {Source identifier: 10403883}
}