@misc{indiciaed343fa0581dd,
  title = {Letter: Masked primary (or tertiary) hyperparathyroidism.},
  author = {W M Keynes and T D Hockaday},
  year = {1975},
  doi = {10.1016/s0140-6736(75)90578-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/51315/},
  note = {Source identifier: 51315}
}