@misc{indiciae8139b7d55127,
  title = {Total or free thyroxin as a primary test of thyroid function.},
  author = {M D Penney and D J O'Sullivan},
  year = {1987},
  url = {https://pubmed.ncbi.nlm.nih.gov/3802469/},
  note = {Source identifier: 3802469}
}