@misc{indiciae65acf3daec83,
  title = {Evaluation of coronary collateral circulation.},
  author = {D C Levin},
  year = {1985},
  doi = {10.1016/0002-9149(85)90434-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/4072921/},
  note = {Source identifier: 4072921}
}