@misc{indiciae50d1b74b7591,
  title = {Choosing the best research design for each question.},
  author = {D L Sackett and J E Wennberg},
  doi = {10.1136/bmj.315.7123.1636},
  url = {https://pubmed.ncbi.nlm.nih.gov/9448521/},
  note = {Source identifier: 9448521}
}