@misc{indiciaea6438dc6da2e,
  title = {Lower esophageal ring. 2.},
  author = {R K Goyal and J J Glancy and H M Spiro},
  year = {1970},
  doi = {10.1056/nejm197006112822406},
  url = {https://pubmed.ncbi.nlm.nih.gov/4910549/},
  note = {Source identifier: 4910549}
}