@misc{indiciae231780f2826a,
  title = {Difficulties encountered in classifying illness in general practice.},
  author = {D J Bain and W J Bassett and A J Haines},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4753479/},
  note = {Source identifier: 4753479}
}