@misc{indiciaeb296095706dc,
  title = {Is the umbrella filter safe?},
  author = {D E Praiss and J L Marmar and J J Moran and E R Brocks and K Mobin-Uddin},
  year = {1972},
  doi = {10.1056/nejm197205042861819},
  url = {https://pubmed.ncbi.nlm.nih.gov/5015435/},
  note = {Source identifier: 5015435}
}