@misc{indiciae21c65114533b,
  title = {Letter: 5-fluorouracil and the thyroid.},
  author = {L V Beex and A Ross and A G Smals and P W Kloppenborg},
  year = {1976},
  doi = {10.1016/s0140-6736(76)90529-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/56692/},
  note = {Source identifier: 56692}
}