@misc{indiciae5e41f089f734,
  title = {Old letters, new rules.},
  author = {Scott Metcalfe},
  year = {2003},
  doi = {10.1016/s0140-6736(03)12593-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/12606208/},
  note = {Source identifier: 12606208}
}