@misc{indiciae0e3402b56916,
  title = {A retrograde step.},
  author = {M Cobourne and D Bister and F McDonald},
  year = {2005},
  doi = {10.1038/sj.bdj.4812978},
  url = {https://pubmed.ncbi.nlm.nih.gov/16311534/},
  note = {Source identifier: 16311534}
}