@misc{indiciaec6911ed4df73,
  title = {Study design III: Cross-sectional studies.},
  author = {Kate Ann Levin},
  year = {2006},
  doi = {10.1038/sj.ebd.6400375},
  url = {https://pubmed.ncbi.nlm.nih.gov/16557257/},
  note = {Source identifier: 16557257}
}