@misc{indiciae4c83a8f83903,
  title = {Statistical methods in research.},
  author = {E R Greenberg and T A Stukel and J A Baron and D H Freeman},
  year = {1993},
  doi = {10.1016/0140-6736(93)92911-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/8105288/},
  note = {Source identifier: 8105288}
}