@misc{indiciaeed4e87fe8e1a,
  title = {A letter to Alan Gregg.},
  author = {J M Russell},
  year = {1968},
  doi = {10.1097/00001888-196811000-00004},
  url = {https://pubmed.ncbi.nlm.nih.gov/4880421/},
  note = {Source identifier: 4880421}
}