@misc{indiciaed685ec6d99ac,
  title = {Certification and recertification.},
  year = {1980},
  doi = {10.1016/s0003-4975(10)61285-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/7425722/},
  note = {Source identifier: 7425722}
}