@misc{indiciaed8a0dda5916d,
  title = {Modified Both respirator.},
  author = {R E SMITH},
  year = {1953},
  doi = {10.1016/s0140-6736(53)91804-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/13036123/},
  note = {Source identifier: 13036123}
}