@misc{indiciaebfd2e15bfa0b,
  title = {Necrotizing vasculitis and ulcerative colitis.},
  author = {F J Wackers and G N Tytgat and J Vreeken},
  year = {1974},
  doi = {10.1136/bmj.4.5936.83},
  url = {https://pubmed.ncbi.nlm.nih.gov/4153412/},
  note = {Source identifier: 4153412}
}