@misc{indiciaeca8057c7cd09,
  title = {Regression models for unbalanced longitudinal ordinal data: computer software and a simulation study.},
  author = {Kai Fun Yu and Weishi Yuan},
  year = {2004},
  doi = {10.1016/j.cmpb.2004.02.006},
  url = {https://pubmed.ncbi.nlm.nih.gov/15265618/},
  note = {Source identifier: 15265618}
}