@misc{indiciae571ad8816314,
  title = {Esophagrams are useful.},
  author = {R G McCauley and D B Darling and J C Leonidas and A M Schwartz and L L Leape},
  year = {1978},
  doi = {10.1542/peds.61.3.503},
  url = {https://pubmed.ncbi.nlm.nih.gov/643433/},
  note = {Source identifier: 643433}
}