@misc{indiciaed419acae8879,
  title = {Longitudinal studies as intervention.},
  author = {C Collins and B Given and D Berry},
  doi = {10.1097/00006199-198907000-00020},
  url = {https://pubmed.ncbi.nlm.nih.gov/2748364/},
  note = {Source identifier: 2748364}
}