@misc{indiciae04c23cb760a5,
  title = {Relating change to initial value.},
  author = {D G Altman},
  year = {1991},
  doi = {10.1159/000186630},
  url = {https://pubmed.ncbi.nlm.nih.gov/1758557/},
  note = {Source identifier: 1758557}
}