@misc{indiciae55d0cbb4232a,
  title = {Measuring what isn't there.},
  author = {Robert P Heaney},
  year = {2005},
  doi = {10.1373/clinchem.2005.053397},
  url = {https://pubmed.ncbi.nlm.nih.gov/16244287/},
  note = {Source identifier: 16244287}
}