@misc{indiciaeefddddef55cb,
  title = {Thyroid function assay using the effective thyroxine ratio (ETR) in infancy.},
  author = {M Koivisto and S Similä and J Haapalahti and M Reinilä},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4855206/},
  note = {Source identifier: 4855206}
}