@misc{indiciae249feaaa682e,
  title = {Effects of cluster sampling on epidemiologic analysis in population-based case-control studies.},
  author = {B I Graubard and T R Fears and M H Gail},
  year = {1989},
  url = {https://pubmed.ncbi.nlm.nih.gov/2611317/},
  note = {Source identifier: 2611317}
}