@misc{indiciae4403b500883c,
  title = {Giving permission.},
  author = {B Johnson and C Johnson},
  year = {1989},
  doi = {10.1016/s0140-6736(89)90163-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/2567463/},
  note = {Source identifier: 2567463}
}