@misc{indiciae91d509d7b476,
  title = {A versatile closed circuit.},
  author = {P Beatty and M F Wheeler and B Kay and W Greer and A T Cohen and J Parkhouse},
  year = {1982},
  doi = {10.1093/bja/54.6.689},
  url = {https://pubmed.ncbi.nlm.nih.gov/6211186/},
  note = {Source identifier: 6211186}
}