@misc{indiciae1c042bac0144,
  title = {A nonhealing ulcer on the face.},
  author = {D K Sun and D M Siegel},
  doi = {10.1001/archfami.9.9.787},
  url = {https://pubmed.ncbi.nlm.nih.gov/11031377/},
  note = {Source identifier: 11031377}
}