@misc{indiciaeca54469d9f20,
  title = {Blood-its derivatives and its problems--factor IX.},
  author = {C K Kasper},
  year = {1975},
  doi = {10.1111/j.1749-6632.1975.tb53342.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1089381/},
  note = {Source identifier: 1089381}
}