@misc{indiciaeac24c071bd78,
  title = {Old letters, new rules.},
  author = {Tsung O Cheng},
  year = {2003},
  doi = {10.1016/s0140-6736(03)12592-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/12606207/},
  note = {Source identifier: 12606207}
}