@misc{indiciaeb918c985989b,
  title = {[Systemic diseases as limitations on thoracic surgical operations].},
  author = {R Gross and G Friedmann},
  year = {1970},
  doi = {10.1007/bf01259085},
  url = {https://pubmed.ncbi.nlm.nih.gov/5521021/},
  note = {Source identifier: 5521021}
}