@misc{indiciae9efdc466023e,
  title = {Endoscopy in achalasia.},
  author = {W Roesch},
  year = {1974},
  doi = {10.1136/pgmj.50.582.211},
  url = {https://pubmed.ncbi.nlm.nih.gov/4471682/},
  note = {Source identifier: 4471682}
}