@misc{indiciae0cf8aa69596b,
  title = {[A case from practice (240). Progressive systemic sclerosis].},
  author = {H Borer and M Kulstrunk and U Steiger},
  year = {1992},
  url = {https://pubmed.ncbi.nlm.nih.gov/1565941/},
  note = {Source identifier: 1565941}
}