@misc{indiciaea8a653cc720e,
  title = {On the mark ...},
  author = {H L Keffer},
  year = {1989},
  doi = {10.1097/00006247-198902000-00003},
  url = {https://pubmed.ncbi.nlm.nih.gov/2922159/},
  note = {Source identifier: 2922159}
}