@misc{indiciaea481ac1663be,
  title = {Turn onto your back, please.},
  author = {R A Berg},
  year = {1977},
  doi = {10.2214/ajr.128.5.871},
  url = {https://pubmed.ncbi.nlm.nih.gov/404925/},
  note = {Source identifier: 404925}
}