@misc{indiciaeb6d1fdea9ed5,
  title = {PPS spurs changes in lab practices.},
  author = {E W Parkhurst and M H Robbins and R P Maurer},
  year = {1985},
  url = {https://pubmed.ncbi.nlm.nih.gov/4038494/},
  note = {Source identifier: 4038494}
}