@misc{indiciae55ae1bfe268d,
  title = {Simplified subtraction technique.},
  author = {K Y Chynn},
  year = {1965},
  doi = {10.2214/ajr.95.4.970},
  url = {https://pubmed.ncbi.nlm.nih.gov/5321188/},
  note = {Source identifier: 5321188}
}