@misc{indiciae847b86d90aa0,
  title = {Inverse association between appendectomy and ulcerative colitis.},
  author = {Roland E B Andersson},
  year = {2002},
  doi = {10.1067/msy.2002.121920},
  url = {https://pubmed.ncbi.nlm.nih.gov/11935141/},
  note = {Source identifier: 11935141}
}