@misc{indiciae6d9304c8c877,
  title = {A shadow over immunoassay.},
  author = {R Ekins},
  year = {1989},
  doi = {10.1038/340256a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/2747790/},
  note = {Source identifier: 2747790}
}