@misc{indiciaec4d7e7da7c07,
  title = {Study design I.},
  author = {Kate Ann Levin},
  year = {2005},
  doi = {10.1038/sj.ebd.6400355},
  url = {https://pubmed.ncbi.nlm.nih.gov/16184164/},
  note = {Source identifier: 16184164}
}