@misc{indiciaea482339dbdc9,
  title = {Sample size calculation for planning group sequential longitudinal trials.},
  author = {A Liu and J M Boyett and X Xiong},
  year = {2000},
  doi = {10.1002/(sici)1097-0258(20000130)19:2<205::aid-sim295>3.0.co;2-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/10641025/},
  note = {Source identifier: 10641025}
}