@misc{indiciae82fffe2a9514,
  title = {Completing questionnaires by proxy.},
  author = {B G Kolnaar and H J van den Hoogen and C van Weel},
  year = {1994},
  url = {https://pubmed.ncbi.nlm.nih.gov/8185994/},
  note = {Source identifier: 8185994}
}