@misc{indiciae2c4eae6bf494,
  title = {[Letter: Ulcerative colitis and virus immunity].},
  author = {J M Baló-Banga and G Kulcsár},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4755887/},
  note = {Source identifier: 4755887}
}