@misc{indiciae64bb0a5771ac,
  title = {Use of randomized duplicate serum specimens to evaluate sampling error and analytical error.},
  author = {H Bokelund and P Winkel},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4440162/},
  note = {Source identifier: 4440162}
}