@misc{indiciaed67ea01a7c04,
  title = {Progressive systemic sclerosis with pulmonary involvement.},
  author = {L E Siltzbach},
  year = {1968},
  doi = {10.1378/chest.54.6.487},
  url = {https://pubmed.ncbi.nlm.nih.gov/5722764/},
  note = {Source identifier: 5722764}
}