@misc{indiciae830b62095bd7,
  title = {Valve replacement without preoperative cardiac catheterization.},
  author = {M G St John Sutton and M St John Sutton and P Oldershaw and R Sacchetti and M Paneth and S C Lennox and R V Gibson and D G Gibson},
  year = {1981},
  doi = {10.1056/nejm198111193052101},
  url = {https://pubmed.ncbi.nlm.nih.gov/7290141/},
  note = {Source identifier: 7290141}
}