@misc{indiciae8fc4934cdf34,
  title = {Computations for group sequential boundaries using the Lan-DeMets spending function method.},
  author = {D M Reboussin and D L DeMets and K M Kim and K K Lan},
  year = {2000},
  doi = {10.1016/s0197-2456(00)00057-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/10822118/},
  note = {Source identifier: 10822118}
}