@misc{indiciae44583708c2fe,
  title = {Validity of questionnaires.},
  author = {Marco H Blanker and Boris W V Schouten},
  year = {2003},
  doi = {10.1016/s0302-2838(02)00584-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/12565785/},
  note = {Source identifier: 12565785}
}