@misc{indiciae012d556425ad,
  title = {Multiple calvarial "doughnut lesions".},
  author = {P M Royen and M B Ozonoff},
  year = {1974},
  doi = {10.2214/ajr.121.1.121},
  url = {https://pubmed.ncbi.nlm.nih.gov/4833899/},
  note = {Source identifier: 4833899}
}