@misc{indiciae0bae17a838c3,
  title = {Diffuse esophageal spasm: a reappraisal.},
  author = {J E Richter and D O Castell},
  year = {1984},
  doi = {10.7326/0003-4819-100-2-242},
  url = {https://pubmed.ncbi.nlm.nih.gov/6691670/},
  note = {Source identifier: 6691670}
}