Free triiodothyronine (t3)- and thyroxine (t4) serum levels in old age.

@article{Herrmann1974FreeT,
  title={Free triiodothyronine (t3)- and thyroxine (t4) serum levels in old age.},
  author={Jacqueline Herrmann and H J Rusche and H. J. Kr{\"o}ll and Peter A Hilger and H. L. Kr{\"u}skemper},
  journal={Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme},
  year={1974},
  volume={6 3},
  pages={239-40}
}