@misc{indiciaeee3f709a7797,
  title = {[Serum tyrosine determination as a thyroid function test].},
  author = {W Ruge and H L Krüskemper and K H Gillich and F Zielske},
  year = {1968},
  doi = {10.1055/s-0028-1110944},
  url = {https://pubmed.ncbi.nlm.nih.gov/4177048/},
  note = {Source identifier: 4177048}
}