@misc{indiciaef8cf15afdb9a,
  title = {Monitoring hyperparathyroidism.},
  author = {M Ryan},
  year = {1989},
  doi = {10.1136/bmj.299.6700.681-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/2508866/},
  note = {Source identifier: 2508866}
}