@misc{indiciae7c416ec6a494,
  title = {Improving response rates with incentives.},
  author = {C Rissel},
  year = {1989},
  doi = {10.5694/j.1326-5377.1989.tb136549.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2716671/},
  note = {Source identifier: 2716671}
}