@misc{indiciaef514aacf9ff7,
  title = {Vascular disease in progressive systemic sclerosis (scleroderma).},
  author = {W L Norton and J M Nardo},
  year = {1970},
  doi = {10.7326/0003-4819-73-2-317},
  url = {https://pubmed.ncbi.nlm.nih.gov/4916764/},
  note = {Source identifier: 4916764}
}