@misc{indiciae46585570cad3,
  title = {[Photographic subtraction--a radiologic routine method].},
  author = {H Backmund and K Decker and W Loy},
  year = {1966},
  url = {https://pubmed.ncbi.nlm.nih.gov/6010850/},
  note = {Source identifier: 6010850}
}