@misc{indiciaefef0c3d191d4,
  title = {A pilot in the first world war.},
  author = {A Bradford Hill},
  doi = {10.1136/bmj.287.6409.1947},
  url = {https://pubmed.ncbi.nlm.nih.gov/6418281/},
  note = {Source identifier: 6418281}
}