@misc{indiciaecb6edf362c87,
  title = {Lower esophageal ring.},
  author = {R K Goyal and H M Spiro},
  year = {1970},
  doi = {10.1056/nejm197009032831017},
  url = {https://pubmed.ncbi.nlm.nih.gov/5434144/},
  note = {Source identifier: 5434144}
}