@misc{indiciae25c4d4aa429b,
  title = {Letter: Tests of thyroid function.},
  author = {W J Irvine and A D Toft},
  year = {1974},
  doi = {10.1136/bmj.4.5939.291},
  url = {https://pubmed.ncbi.nlm.nih.gov/4138948/},
  note = {Source identifier: 4138948}
}