@misc{indiciae9990db375e27,
  title = {Epidemiologic research.},
  author = {W H Gullen},
  year = {1978},
  doi = {10.1001/jama.1978.03280520027003},
  url = {https://pubmed.ncbi.nlm.nih.gov/650835/},
  note = {Source identifier: 650835}
}