@misc{indiciae91c4ef403ac2,
  title = {Structured correlation in models for clustered data.},
  author = {Edward C Chao},
  year = {2006},
  doi = {10.1002/sim.2368},
  url = {https://pubmed.ncbi.nlm.nih.gov/16220520/},
  note = {Source identifier: 16220520}
}