@misc{indiciae8a3579612fae,
  title = {Vitamin K and prothrombin formation.},
  author = {G S Ranhotra and B C Johnson},
  year = {1970},
  doi = {10.1016/0024-3205(70)90247-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5437499/},
  note = {Source identifier: 5437499}
}