@misc{indiciae529e40f9d7a5,
  title = {Rationalizing back pain: the development of a classification system through cluster analysis.},
  author = {J M Langworthy and A C Breen},
  year = {1997},
  url = {https://pubmed.ncbi.nlm.nih.gov/9200044/},
  note = {Source identifier: 9200044}
}