@misc{indiciae58490ba3ce07,
  title = {First signals.},
  author = {Alan D Widgerow},
  year = {2004},
  doi = {10.1097/01.prs.0000121192.83247.f5},
  url = {https://pubmed.ncbi.nlm.nih.gov/15253216/},
  note = {Source identifier: 15253216}
}