@misc{indiciae6b04d7c0eb78,
  title = {Forecasting and chronic illness.},
  author = {W J Hirschfeld},
  year = {1971},
  doi = {10.1007/bf02476784},
  url = {https://pubmed.ncbi.nlm.nih.gov/5158937/},
  note = {Source identifier: 5158937}
}