@misc{indiciae741366a31096,
  title = {Does maintenance therapy keep duodenal ulcers healed?},
  author = {E J Boyd and J G Penston and D A Johnston and K G Wormsley},
  year = {1988},
  doi = {10.1016/s0140-6736(88)92131-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/2897568/},
  note = {Source identifier: 2897568}
}