@misc{indiciaecfc8182581dc,
  title = {Inverse association between appendicectomy and ulcerative colitis.},
  author = {Morten Frisch},
  year = {2006},
  doi = {10.1136/bmj.332.7541.561},
  url = {https://pubmed.ncbi.nlm.nih.gov/16528060/},
  note = {Source identifier: 16528060}
}