@misc{indiciaecc6fff5fcbc5,
  title = {Case-control studies with cluster sampling.},
  author = {B I Graubard and M H Gail and T R Fears},
  year = {1991},
  url = {https://pubmed.ncbi.nlm.nih.gov/1912273/},
  note = {Source identifier: 1912273}
}