@misc{indiciae886c407b0191,
  title = {A practical approach to a multi-level analysis with a sparse binary outcome within a large surgical trial.},
  author = {Jayne Fountain and James Gallagher and Julia Brown},
  year = {2004},
  doi = {10.1111/j.1365-2753.2003.00462.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/15189398/},
  note = {Source identifier: 15189398}
}