@misc{indiciae206c10783eec,
  title = {Conscientious objection to an opt-in system.},
  author = {Chris Hackler},
  year = {2004},
  doi = {10.1080/15265160490906600},
  url = {https://pubmed.ncbi.nlm.nih.gov/16192193/},
  note = {Source identifier: 16192193}
}