@misc{indiciaeec86c262b1ed,
  title = {Information for patients.},
  author = {R M Helsdon},
  year = {1973},
  doi = {10.1016/s0140-6736(73)90774-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/4120691/},
  note = {Source identifier: 4120691}
}