@misc{indiciaecf9321efdc51,
  title = {Appendectomy and ulcerative colitis.},
  author = {Morten Frisch and Claus Rostgaard},
  year = {2005},
  doi = {10.1097/01.ede.0000147362.09776.d8},
  url = {https://pubmed.ncbi.nlm.nih.gov/15613959/},
  note = {Source identifier: 15613959}
}