@misc{indiciae3ef3469e75ad,
  title = {Abnormal upper esophageal sphincter function in achalasia.},
  author = {R S Dudnick and J A Castell and D O Castell},
  year = {1992},
  url = {https://pubmed.ncbi.nlm.nih.gov/1449131/},
  note = {Source identifier: 1449131}
}