@misc{indiciae0f40eebe9dd7,
  title = {Observer variability in upper gastrointestinal fiber endoscopy.},
  author = {P A Kling and K Edin and L Domellöf},
  year = {1985},
  doi = {10.3109/00365528509089681},
  url = {https://pubmed.ncbi.nlm.nih.gov/4023612/},
  note = {Source identifier: 4023612}
}