@misc{indiciaec4195b813277,
  title = {Challenge: new educational levels.},
  author = {Sean P Clark},
  year = {2006},
  doi = {10.1097/00006247-200605000-00014},
  url = {https://pubmed.ncbi.nlm.nih.gov/16651906/},
  note = {Source identifier: 16651906}
}