@misc{indiciaed060c8924f3e,
  title = {Aphthous ulcers and folate.},
  author = {B D Birt and J H Mather},
  year = {1968},
  doi = {10.1136/bmj.2.5607.763-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/5656285/},
  note = {Source identifier: 5656285}
}