@misc{indiciae55a51918509e,
  title = {Ulcerative colitis.},
  author = {L ZETZEL},
  year = {1954},
  doi = {10.1056/nejm195410072511505},
  url = {https://pubmed.ncbi.nlm.nih.gov/13214294/},
  note = {Source identifier: 13214294}
}