@misc{indiciae7ea10ccc6639,
  title = {Recurrent aphthous ulcers.},
  author = {D F Harrison},
  year = {1967},
  doi = {10.1016/s0140-6736(67)90100-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/4165456/},
  note = {Source identifier: 4165456}
}