@misc{indiciaed574001999fc,
  title = {Problems in ulcerative colitis.},
  author = {T E MACHELLA},
  year = {1952},
  doi = {10.1016/0002-9343(52)90375-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/13016573/},
  note = {Source identifier: 13016573}
}