@misc{indiciae96520797ac5e,
  title = {Variability in plasma prothrombin concentration: implications for use in epidemiology.},
  author = {A M Smiles and E M Macy and P A Sakkinen and E G Bovill and K G Mann and R P Tracy},
  year = {1998},
  doi = {10.1097/00001721-199809000-00010},
  url = {https://pubmed.ncbi.nlm.nih.gov/9819003/},
  note = {Source identifier: 9819003}
}