@misc{indiciae9c25573cd402,
  title = {Recertification 1977.},
  author = {R G Petersdorf},
  year = {1977},
  doi = {10.7326/0003-4819-86-5-651},
  url = {https://pubmed.ncbi.nlm.nih.gov/851318/},
  note = {Source identifier: 851318}
}