@misc{indiciae2b8ed15af923,
  title = {Angiogenesis in progressive systemic sclerosis.},
  author = {R C Siegel},
  year = {1972},
  doi = {10.1056/nejm197201272860414},
  url = {https://pubmed.ncbi.nlm.nih.gov/4536624/},
  note = {Source identifier: 4536624}
}