@misc{indiciaed2422a332c4d,
  title = {Back pressure check valves a hazard.},
  author = {G Comm and L Rendell-Baker},
  year = {1982},
  doi = {10.1097/00000542-198204000-00023},
  url = {https://pubmed.ncbi.nlm.nih.gov/7065446/},
  note = {Source identifier: 7065446}
}