@misc{indiciae6cdc988e5a2e,
  title = {Primary concern.},
  author = {H A Dudley},
  year = {1972},
  doi = {10.1016/s0140-6736(72)91109-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4113579/},
  note = {Source identifier: 4113579}
}