@misc{indiciae27f3d61182d9,
  title = {IHS Classification: present and future.},
  author = {J Olesen},
  year = {1993},
  doi = {10.1177/0333102493013s1220},
  url = {https://pubmed.ncbi.nlm.nih.gov/8500158/},
  note = {Source identifier: 8500158}
}