@misc{indiciaec2611ceb4a19,
  title = {International variation.},
  author = {Donald M Parkin},
  year = {2004},
  doi = {10.1038/sj.onc.1207726},
  url = {https://pubmed.ncbi.nlm.nih.gov/15322508/},
  note = {Source identifier: 15322508}
}