@misc{indiciae100c8a8d65ea,
  title = {Free thyroxine index.},
  author = {F Clark and D B Horn},
  year = {1981},
  doi = {10.1016/s0140-6736(81)91377-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/6118750/},
  note = {Source identifier: 6118750}
}