@misc{indiciae19a91fc94a10,
  title = {Letter: N.B.T. test.},
  author = {H B Allen},
  year = {1973},
  doi = {10.1016/s0140-6736(73)92055-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/4126962/},
  note = {Source identifier: 4126962}
}