@misc{indiciaed53ec57f34a5,
  title = {"Zero reference" during cardiac catheterization.},
  author = {J D Waldman and T S Loeffler and S W Turner and S J Pappelbaum},
  year = {1978},
  url = {https://pubmed.ncbi.nlm.nih.gov/667925/},
  note = {Source identifier: 667925}
}