@misc{indiciae389f11fc1882,
  title = {Why predictive indexes perform less well in validation studies. Is it magic or methods?},
  author = {M E Charlson and K L Ales and R Simon and C R MacKenzie},
  year = {1987},
  url = {https://pubmed.ncbi.nlm.nih.gov/3689067/},
  note = {Source identifier: 3689067}
}