@misc{indiciaef952efe8187d,
  title = {Research design.},
  author = {M E Megel and J A Heermann},
  year = {1993},
  doi = {10.1097/00006527-199301340-00010},
  url = {https://pubmed.ncbi.nlm.nih.gov/8121952/},
  note = {Source identifier: 8121952}
}