@misc{indiciaecb76184c47e6,
  title = {Lower esophageal ring.},
  author = {M K BARTLETT and P KRAMER},
  year = {1963},
  doi = {10.1056/nejm196305232682121},
  url = {https://pubmed.ncbi.nlm.nih.gov/13969701/},
  note = {Source identifier: 13969701}
}