@misc{indiciae25b6febad588,
  title = {The ulcer problem.},
  author = {I S RAVDIN},
  year = {1950},
  doi = {10.1080/00325481.1950.11694010},
  url = {https://pubmed.ncbi.nlm.nih.gov/14780929/},
  note = {Source identifier: 14780929}
}