@misc{indiciae1233127955f4,
  title = {Respiration tracking in radiosurgery.},
  author = {Achim Schweikard and Hiroya Shiomi and John Adler},
  year = {2004},
  doi = {10.1118/1.1774132},
  url = {https://pubmed.ncbi.nlm.nih.gov/15543778/},
  note = {Source identifier: 15543778}
}