@misc{indiciaecc969c738948,
  title = {Frequency doubling technology staging system 2.},
  author = {Paolo Brusini},
  year = {2006},
  doi = {10.1097/01.ijg.0000212234.88416.f4},
  url = {https://pubmed.ncbi.nlm.nih.gov/16865009/},
  note = {Source identifier: 16865009}
}