@misc{indiciaed0b21b041afe,
  title = {Using a metal detector to locate a swallowed ring pull.},
  author = {J Ryan and C A Perez-Avila and A Cherukuri and B Tidey},
  year = {1995},
  doi = {10.1136/emj.12.1.64},
  url = {https://pubmed.ncbi.nlm.nih.gov/7640836/},
  note = {Source identifier: 7640836}
}