@misc{indiciae9da6a6714bb4,
  title = {Optimal positioning for cervical and thoracic operations.},
  author = {E K Betts},
  year = {1979},
  doi = {10.1097/00000542-197911000-00039},
  url = {https://pubmed.ncbi.nlm.nih.gov/496074/},
  note = {Source identifier: 496074}
}