@misc{indiciae43c059ce7ecc,
  title = {Sample size calculations for controlled clinical trials using generalized estimating equations (GEE).},
  author = {G Dahmen and J Rochon and I R König and A Ziegler},
  year = {2004},
  url = {https://pubmed.ncbi.nlm.nih.gov/15702199/},
  note = {Source identifier: 15702199}
}