@misc{indiciae076c96c00422,
  title = {Asymptomatic radiopacity.},
  author = {W E Burrell},
  year = {1973},
  doi = {10.1016/0030-4220(73)90106-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/4508835/},
  note = {Source identifier: 4508835}
}