@misc{indiciae56331dbaeecd,
  title = {A generalized estimating equations approach for testing ordered group effects with repeated measurements.},
  author = {T Park and D W Shin and C G Park},
  year = {1998},
  url = {https://pubmed.ncbi.nlm.nih.gov/9883556/},
  note = {Source identifier: 9883556}
}