@misc{indiciae9293b65809cd,
  title = {ECFMG and FLEX.},
  author = {N Ettlinger},
  year = {1976},
  doi = {10.1136/bmj.2.6040.880},
  url = {https://pubmed.ncbi.nlm.nih.gov/990737/},
  note = {Source identifier: 990737}
}