@misc{indiciae63c3a2a3ea0e,
  title = {Unsolved or unsolvable problems with diagnostic reference levels.},
  author = {W Leitz and A Almén},
  year = {2005},
  doi = {10.1093/rpd/nch504},
  url = {https://pubmed.ncbi.nlm.nih.gov/15933104/},
  note = {Source identifier: 15933104}
}