@misc{indiciae10e37c619d90,
  title = {Rare diseases do occur.},
  author = {A J Levine and D J Williams},
  year = {1991},
  doi = {10.1136/emj.8.4.296},
  url = {https://pubmed.ncbi.nlm.nih.gov/1837715/},
  note = {Source identifier: 1837715}
}