@article{causalmediationanalysiswithhidden,
  title = {Causal Mediation Analysis with Hidden Confounders},
  author = {Lu Cheng and Ruocheng Guo and Huan Liu},
  year = {2021},
  eprint = {2102.11724},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2102.11724v3},
}